Document and Entity Information (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Mar. 29, 2015	May 22, 2015	Sep. 28, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	HAWKINS INC
Entity Central Index Key	0000046250
Document Type	10-K
Document Period End Date	Mar. 29, 2015
Amendment Flag	false
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--03-29
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Public Float			$ 335.8
Entity Common Stock, Shares Outstanding		10,615,623

Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014
CURRENT ASSETS:
Cash and cash equivalents	$ 18,639	$ 33,486
Investments available-for-sale	14,485	13,843
Trade receivables, less allowance for doubtful accounts of $445 for 2015 and $477 for 2014	40,355	37,946
Inventories	37,028	26,192
Income taxes receivable	732	0
Prepaid expenses and other current assets	3,101	3,160
Total current assets	114,340	114,627
PROPERTY, PLANT, AND EQUIPMENT:
Land	8,038	8,038
Buildings and improvements	73,095	68,801
Machinery and equipment	60,077	53,089
Transportation equipment	19,596	17,764
Office furniture and equipment including computer systems	11,966	11,183
Property, plant and equipment, gross	172,772	158,875
Less accumulated depreciation	79,042	68,406
Net property, plant, and equipment	93,730	90,469
OTHER ASSETS:
Goodwill	11,750	7,392
Intangible assets, less accumulated amortization of $3,933 for 2015 and $3,069 for 2014	11,154	8,509
Long-term investments	17,249	15,852
Other	239	344
Total other assets	40,392	32,097
Total assets	248,462	237,193
CURRENT LIABILITIES:
Accounts payable — trade	20,083	18,306
Dividends payable	4,038	3,823
Accrued payroll and employee benefits	6,122	5,555
Deferred income taxes	2,698	2,900
Income tax payable	0	1,444
Other current liabilities	3,402	3,801
Total current liabilities	36,343	35,829
PENSION WITHDRAWAL LIABILITY	6,589	6,887
OTHER LONG-TERM LIABILITIES	1,588	1,878
DEFERRED INCOME TAXES	9,978	10,186
Total liabilities	54,498	54,780
COMMITMENTS AND CONTINGENCIES	0	0
SHAREHOLDERS’ EQUITY:
Common stock; authorized: 30,000,000 shares of $0.05 par value; 10,564,949 and 10,562,400 shares issued and outstanding for 2015 and 2014, respectively	528	528
Additional paid-in capital	50,901	50,502
Retained earnings	142,567	131,427
Accumulated other comprehensive loss	(32)	(44)
Total shareholders’ equity	193,964	182,413
Total liabilities and shareholders’ equity	$ 248,462	$ 237,193

Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014
Statement of Financial Position [Abstract]
Allowance for doubtful accounts receivable	$ 445	$ 477
Intangible assets, accumulated amortization	$ 3,933	$ 3,069
Common stock, shares authorized (shares)	30,000,000	30,000,000
Common stock, par value (usd per share)	$ 0.05	$ 0.05
Common stock, shares issued (shares)	10,564,949	10,562,400
Common stock, shares outstanding (shares)	10,564,949	10,562,400

Condensed Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Income Statement [Abstract]
Sales	$ 364,023	$ 348,263	$ 350,387
Cost of sales	(298,232)	(286,663)	(286,241)
Pension withdrawal	0	0	(7,210)
Gross profit	65,791	61,600	56,936
Selling, general and administrative expenses	(35,375)	(33,510)	(31,606)
Operating income	30,416	28,090	25,330
Interest income (expense), net	38	(29)	84
Income from continuing operations before income taxes	30,454	28,061	25,414
Income tax provision	11,240	9,967	8,306
Income from continuing operations	19,214	18,094	17,108
Income from discontinued operations, net of tax	0	0	18
Net income	$ 19,214	$ 18,094	$ 17,126
Weighted average number of shares outstanding-basic	10,568,582	10,544,467	10,464,820
Weighted average number of shares outstanding-diluted	10,633,554	10,599,755	10,541,142
Basic earnings per share:
Earnings per share from continuing operations	$ 1.82	$ 1.72	$ 1.64
Earnings per share from discontinued operations	$ 0.00	$ 0.00	$ 0.00
Basic earnings per share	$ 1.82	$ 1.72	$ 1.64
Diluted earnings per share
Earnings per share from continuing operations	$ 1.81	$ 1.71	$ 1.62
Earnings per share from discontinued operations	$ 0.00	$ 0.00	$ 0.00
Diluted earnings per share	$ 1.81	$ 1.71	$ 1.62
Cash dividends declared per common share	$ 0.76	$ 0.72	$ 0.68

Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 19,214	$ 18,094	$ 17,126
Unrealized gain (loss) on available-for-sale investments	11	(47)	12
Unrealized gain on post-retirement liability	1	109	5
Total other comprehensive income	12	62	17
Total comprehensive income	$ 19,226	$ 18,156	$ 17,143

Consolidated Statements of Shareholders' Equity and Comprehensive Income (Loss) Statement (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Stockholders' equity, beginning balance at Apr. 01, 2012	$ 156,607	$ 522	$ 45,169	$ 111,039	$ (123)
Shares outstanding, beginning balance at Apr. 01, 2012		10,430,874
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends	(7,191)			(7,191)
Stock compensation expense	1,630		1,630
Tax benefit on share-based compensation plans	510		510
Vesting of restricted stock (shares)		6,120
Vesting of restricted stock	1		1
Shares surrendered for payroll taxes (shares)
Shares surrendered for payroll taxes	0
Stock Options Exercised (shares)		27,999
Stock options exercised	515	1	514
ESPP Shares Issued (shares)	30,434	30,434
ESPP shares issued	959	2	957
Total other comprehensive income	17				17
Shares repurchased	0
Net income	17,126			17,126
Stockholders' equity, ending balance at Mar. 31, 2013	170,172	525	48,779	120,974	(106)
Shares outstanding, ending balance at Mar. 31, 2013		10,495,427
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends	(7,641)			(7,641)
Stock compensation expense	1,322		1,322
Tax benefit on share-based compensation plans	(214)		(214)
Vesting of restricted stock (shares)		41,906
Vesting of restricted stock	0	(2)	2
Shares surrendered for payroll taxes (shares)		(12,480)
Shares surrendered for payroll taxes	(485)	(1)	(484)
Stock Options Exercised (shares)		9,333
Stock options exercised	186	1	185
ESPP Shares Issued (shares)	28,214	28,214
ESPP shares issued	917	1	916
Total other comprehensive income	62				62
Shares repurchased	0
Net income	18,094
Stockholders' equity, ending balance at Mar. 30, 2014	182,413	528	50,502	131,427	(44)
Shares outstanding, ending balance at Mar. 30, 2014		10,562,400
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends	(8,074)			(8,074)
Stock compensation expense	1,631		1,631
Tax benefit on share-based compensation plans	92		92
Vesting of restricted stock (shares)		29,355
Vesting of restricted stock	0	(1)	1
Shares surrendered for payroll taxes (shares)		(7,920)
Shares surrendered for payroll taxes	(295)		(295)
Stock Options Exercised (shares)		9,333
Stock options exercised	186		186
ESPP Shares Issued (shares)	31,383	31,383
ESPP shares issued	988	2	986
Total other comprehensive income	12				12
Shares Repurchased (Shares)	(59,602)	(59,602)
Shares repurchased	(2,203)	(3)	(2,200)
Net income	19,214			19,214
Stockholders' equity, ending balance at Mar. 29, 2015	$ 193,964	$ 528	$ 50,901	$ 142,567	$ (32)
Shares outstanding, ending balance at Mar. 29, 2015		10,564,949

Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 19,214	$ 18,094	$ 17,126
Reconciliation to cash flows:
Depreciation and amortization	13,015	12,605	10,248
Deferred income taxes	(418)	2,150	(2,985)
Pension withdrawal	0	0	7,210
Share-based compensation expense	1,631	1,322	1,621
Loss from property disposals	45	111	153
Changes in operating accounts (using) providing cash, net of effects of acquisition:
Trade receivables	(1,051)	(1,698)	2,149
Inventories	(9,977)	2,122	(573)
Accounts payable	563	335	(1,185)
Accrued liabilities	(506)	141	(1,319)
Income taxes	(2,177)	(2)	3,893
Other	325	(568)	(864)
Net cash provided by operating activities	20,664	34,612	35,474
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to property, plant, and equipment	(14,552)	(12,261)	(26,660)
Purchases of investments	(15,303)	(25,161)	(18,755)
Sale and maturities of investments	13,280	16,612	14,900
Proceeds from property disposals	223	115	233
Acquisitions	(10,068)	(2,416)	(100)
Net cash used in investing activities	(26,420)	(23,111)	(30,382)
CASH FLOWS FROM FINANCING ACTIVITIES:
Cash dividends paid	(7,859)	(7,410)	(6,936)
New shares issued	988	917	968
Stock options exercised	186	186	515
Excess tax benefit from share-based compensation	92	62	510
Shares surrendered for payroll taxes	(295)	(485)	0
Shares repurchased	(2,203)	0	0
Net cash used in financing activities	(9,091)	(6,730)	(4,943)
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(14,847)	4,771	149
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	33,486	28,715	28,566
CASH AND CASH EQUIVALENTS, END OF PERIOD	18,639	33,486	28,715
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION-
Cash paid during the year for income taxes	13,801	7,757	6,900
Capital expenditures in accounts payable	$ 1,126	$ 699	$ 1,401

Nature of Business and Significant Accounting Policies

12 Months Ended

Mar. 29, 2015

Accounting Policies [Abstract]

Nature of Business and Significant Accounting Policies

Nature of Business - We have two reportable segments: Industrial and Water Treatment. The Industrial Group operates our Industrial segment and specializes in providing industrial chemicals, products and services to industries such as agriculture, chemical processing, electronics, energy, food, pharmaceutical, plating and power generation. The group also manufactures and sells certain food-grade products, including liquid phosphates, lactates and other blended products. The Water Treatment Group operates our Water Treatment segment and specializes in providing chemicals, equipment and solutions for potable water, municipal and industrial wastewater, industrial process water and non-residential swimming pool water. The group has the resources and flexibility to treat systems ranging in size from a single small well to a multi-million-gallon-per-day facility.

Fiscal Year - Our fiscal year is a 52/53-week year ending on the Sunday closest to March 31. Our fiscal years ended March 29, 2015 (“fiscal 2015”), March 30, 2014 (“fiscal 2014”), and March 31, 2013 (“fiscal 2013”) were 52 weeks. The fiscal year ending April 3, 2016 (“fiscal 2016”) will be 53 weeks.

Principles of Consolidation - The consolidated financial statements include the accounts of Hawkins, Inc. and its wholly-owned subsidiaries. All intercompany transactions and accounts have been eliminated.

Estimates - The preparation of financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reported period. Actual results could differ from those estimates.

Revenue Recognition - We recognize revenue when there is evidence that the customer has agreed to purchase the product, the price and terms of the sale are fixed, the product has shipped and title has passed to our customer, performance has occurred, and collection of the receivable is reasonably assured.

Shipping and Handling - All shipping and handling amounts billed to customers are included in revenues. Costs incurred related to the shipping and the handling of products are included in cost of sales.

Fair Value Measurements - The financial assets and liabilities that are re-measured and reported at fair value for each reporting period include marketable securities, as well as contingent consideration payable related to the acquisition of Advance Chemical Solutions, Inc. (“ACS”). There are no fair value measurements with respect to nonfinancial assets or liabilities that are recognized or disclosed at fair value in our consolidated financial statements on a recurring basis.

Assets and liabilities measured at fair value are classified using the following hierarchy, which is based upon the transparency of inputs to the valuation as of the measurement date:

Level 1: Valuation is based on observable inputs such as quoted market prices (unadjusted) for identical assets or liabilities in active markets.

Level 2: Valuation is based on inputs such as quoted market prices for similar assets or liabilities in active markets or other inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument.

Level 3: Valuation is based upon other unobservable inputs that are significant to the fair value measurement.

In making fair value measurements, observable market data must be used when available. When inputs used to measure fair value fall within different levels of the hierarchy, the level within which the fair value measurement is categorized is based on the lowest level input that is significant to the fair value measurement.

Cash Equivalents - Cash equivalents include all liquid debt instruments (primarily cash funds and money market accounts) purchased with an original maturity of three months or less. The balances maintained at financial institutions may, at times, exceed federally insured limits.

Investments - Available-for-sale securities consist of certificates of deposit (“CD’s”) and municipal bonds and are valued at current market value, with the resulting unrealized gains and losses excluded from earnings and reported, net of tax, as a separate component of shareholders’ equity until realized. Any impairment loss to reduce an investment’s carrying amount to its fair market value is recognized in income when a decline in the fair market value of an individual security below its cost or carrying value is determined to be other than temporary.

Trade Receivables and Concentrations of Credit Risk - Financial instruments, which potentially subject us to a concentration of credit risk, principally consist of trade receivables. We sell our principal products to a large number of customers in many different industries. There are no concentrations of credit risk with a single customer from a particular service or geographic area that would significantly impact us in the near term. To reduce credit risk, we routinely assess the financial strength of our customers. We record an allowance for doubtful accounts to reduce our receivables to an amount we estimate is collectible from our customers. Estimates used in determining the allowance for doubtful accounts are based on historical collection experience, current trends, aging of accounts receivable and periodic evaluations of our customers’ financial condition. We invest our excess cash balances at times in CD’s, municipal bonds and money market accounts at two separate financial institutions where the cash balances may exceed federally insured limits. The institutions are two of the largest commercial banking institutions in the country and both have maintained strong credit ratings.

Inventories - Inventories, consisting primarily of finished goods, are primarily valued at the lower of cost or net realizable value, with cost for the vast majority of our inventory determined using the last-in, first-out (“LIFO”) method. The amount of inventory valued using the first-in, first-out (“FIFO”) method represents approximately 8% of the total FIFO inventory balance at March 29, 2015.

Property, Plant and Equipment - Property is stated at cost and depreciated or amortized over the lives of the assets, using the straight-line method. Estimated lives are: 10 to 40 years for buildings and improvements; 3 to 20 years for machinery and equipment; 3 to 10 years for transportation equipment; and 3 to 10 years for office furniture and equipment including computer systems. Leasehold improvements are depreciated over the lesser of their estimated useful lives or the remaining lease term.

Significant improvements that add to productive capacity or extend the lives of properties are capitalized. Costs for repairs and maintenance are charged to expense as incurred. When property is retired or otherwise disposed of, the cost and related accumulated depreciation or amortization are removed from the accounts and any related gains or losses are included in income.

We review the recoverability of long-lived assets to be held and used, such as property, plant and equipment, when events or changes in circumstances occur that indicate the carrying value of the asset group may not be recoverable, such as prolonged industry downturn or significant reductions in projected future cash flows. The assessment of possible impairment is based on our ability to recover the carrying value of the asset group from the expected future pre-tax cash flows (undiscounted) of the related operations. If these cash flows are less than the carrying value of such asset group, an impairment loss would be measured by the amount the carrying value exceeds the fair value of the long-lived asset group. The measurement of impairment requires us to estimate future cash flows and the fair value of long-lived assets. No long-lived assets were determined to be impaired during fiscal years 2015, 2014 or 2013.

Goodwill and Identifiable Intangible Assets - Goodwill represents the excess of the cost of acquired businesses over the fair value of identifiable tangible net assets and identifiable intangible assets purchased. Goodwill is tested at least annually for impairment, and is tested for impairment more frequently if events or changes in circumstances indicate that the asset might be impaired. As of January 1, 2015, the company performed an analysis of qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount as a basis for determining whether it is necessary to perform a two-step goodwill impairment test. Based on management’s analysis of qualitative factors, we determined that it was not necessary to perform a two-step goodwill impairment test for either reporting unit.

Our primary identifiable intangible assets include customer lists, trade secrets, non-compete agreements, trademarks, and trade names acquired in previous business acquisitions. Identifiable intangible assets with finite lives are amortized whereas identifiable intangible assets with indefinite lives are not amortized. The values assigned to the intangible assets with finite lives are being amortized on average over approximately 13 years. Identifiable intangible assets that are subject to amortization are evaluated for impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. Identifiable intangible assets not subject to amortization are tested for impairment annually or more frequently if events warrant. The impairment test consists of a qualitative assessment to determine whether it is more likely than not that the asset is impaired. Based on management’s analysis of qualitative factors, we determined that it was not necessary to perform a quantitative impairment test for fiscal 2015.

Impairment assessments were also completed in the fourth quarters of fiscal 2014 and 2013, which resulted in no impairment charges for either of these fiscal years.

Income Taxes - In the preparation of our consolidated financial statements, the calculation of income taxes by management is based upon the estimated effective rate applicable to operating results for the full fiscal year. This includes estimating the current tax liability as well as assessing differences resulting from different treatment of items for tax and book accounting purposes. Differences that are temporary in nature result in deferred tax assets and liabilities, which are recorded on the balance sheet, while differences that are permanent in nature impact the income tax expense recorded on the income statement and impact the effective tax rate for the fiscal year. The deferred tax assets and liabilities are analyzed regularly and management assesses the likelihood that deferred tax assets will be recovered from future taxable income. We record any interest and penalties related to income taxes as income tax expense in the statements of income.

The effect of income tax positions are recognized only if those positions are more likely than not of being sustained. Changes in recognition or measurement are made as facts and circumstances change.

Stock-Based Compensation - We account for stock-based compensation on a fair value basis. The estimated grant date fair value of each stock-based award is recognized in expense over the requisite service period (generally the vesting period). Non-vested share awards are recorded as expense over the requisite service periods based on the market value on the date of grant.

Earnings Per Share - Basic earnings per share (“EPS”) are computed by dividing net income by the weighted-average number of common shares outstanding. Diluted EPS are computed by dividing net income by the weighted-average number of common shares outstanding including the incremental shares assumed to be issued upon the exercise of stock options and the incremental shares assumed to be issued as performance units and restricted stock. Basic and diluted EPS were calculated using the following:



	March 29, 2015	March 30, 2014	March 31, 2013
Weighted average common shares outstanding — basic	10,568,582	10,544,467	10,464,820
Dilutive impact of stock performance units, restricted stock, and stock options	64,972	55,288	76,322
Weighted average common shares outstanding — diluted	10,633,554	10,599,755	10,541,142

There were no shares or stock options excluded from the calculation of weighted average common shares for diluted EPS for fiscal 2015, 2014 or 2013.

Derivative Instruments and Hedging Activities - We do not have any freestanding or embedded derivatives and it is our practice to not enter into contracts that contain them.

Recently Issued Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board issued new accounting requirements for recognition of revenue from contracts with customers. The requirements of the new standard will be effective for annual reporting periods beginning after December 15, 2016 (our fiscal year ending April 1, 2018), and interim periods within those annual periods. We are currently evaluating the impact of this accounting pronouncement.

Business Combinations (Notes)

12 Months Ended

Mar. 29, 2015

Business Combinations [Abstract]

Business Combination Disclosure [Text Block]

Business Combinations

Acquisition of The Dumont Company, Inc.: On October 20, 2014, we acquired substantially all of the assets of The Dumont Company, Inc. (“Dumont”) under the terms of an asset purchase agreement with Dumont and its shareholders. We paid $10.1 million in cash including a working capital adjustment in the third quarter of fiscal 2015, using available cash on hand to fund the acquisition. Dumont was a water treatment chemical distribution company with revenues of approximately $14.0 million in calendar year 2013. Through this acquisition we added seven operating locations across Florida. The results of operations since the acquisition date, and the assets, including the goodwill associated with this acquisition, are included in our Water Treatment segment. Costs associated with this transaction were not material to our company and were expensed as incurred.

The acquisition has been accounted for under the acquisition method of accounting, under which the total purchase price is allocated to the net tangible and intangible assets of Dumont acquired in connection with the acquisition based on their estimated fair values. We estimated the fair values of the assets acquired and liabilities assumed using a discounted cash flow analysis (income approach). The following table summarizes the preliminary allocation of the purchase price to the fair values assigned to the assets acquired and liabilities assumed at the date of the Dumont acquisition:



(In thousands)	Amount
Accounts receivable	$	1,358
Inventory	859
Other assets	159
Property, plant, and equipment	702
Intangible assets	3,509
Current liabilities	(877		)
Net assets acquired	5,710
Goodwill	4,358
Total purchase price	$	10,068

The goodwill recognized as a result of this acquisition is primarily attributable to strategic and synergistic benefits, as well as the assembled workforce. Such goodwill is expected to be deductible for tax purposes.

The preliminary allocation of the purchase price to the assets acquired and liabilities assumed resulted in the recognition of the following intangible assets:



(In thousands)	Amount		Life (in years)
Customer relationships	$	2,810	20
Trade name	699		4
	$	3,509

Acquisition of Advance Chemical Solutions, Inc.: On October 1, 2013, we acquired substantially all of the assets of ACS. We paid $2.4 million in cash at closing, and have paid an additional $0.4 million of a potential $0.5 million earnout in fiscal 2015. We may be obligated to pay the remainder of the earnout over the next two years based on the achievement of certain financial performance targets.

The ACS acquisition was accounted for under the acquisition method of accounting, under which the total estimated purchase price is allocated to the net tangible and intangible assets acquired based on their estimated fair values. We estimated the fair values of the assets acquired and liabilities assumed to be $2.8 million using a discounted cash flow analysis (income approach). ACS had revenues of approximately $4.0 million for the 12 months ended September 30, 2013. The results of its operations since the acquisition date, and the assets, are included in our Water Treatment segment.

Cash and Cash Equivalents and Investments

12 Months Ended

Mar. 29, 2015

Cash and Cash Equivalents [Abstract]

Cash and Cash Equivalents and Investments

The following table presents information about our financial assets that are measured at fair value on a recurring basis as of March 29, 2015 and March 30, 2014, and indicates the fair value hierarchy of the valuation techniques utilized to determine such fair value.



Description	March 29, 2015		Level 1		Level 2		Level 3
(In thousands)	March 29, 2015		Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents	$	18,639	$	18,639	$	—	$	—
Certificates of deposit	29,136		—		29,136		—
Municipal Bonds	2,598		—		2,598		—

Description	March 30, 2014		Level 1		Level 2		Level 3
(In thousands)	March 30, 2014		Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents	$	33,486	$	33,486	$	—	$	—
Certificates of deposit	24,437		—		24,437		—
Municipal Bonds	5,258		—		5,258		—

Our financial assets that are measured at fair value on a recurring basis are CD’s and municipal bonds, with maturities ranging from three months to three years, which fall within valuation technique Level 2. The CD’s and municipal bonds are classified as investments in current assets and noncurrent assets on the condensed consolidated balance sheets. As of March 29, 2015, the CD’s and municipal bonds had a fair value of $14.5 million in current assets and $17.2 million in noncurrent assets.

The carrying value of cash and cash equivalents accounts approximates fair value, as maturities are three months or less.

The contractual maturities of available-for-sale securities at March 29, 2015 and March 30, 2014 are shown in the table below:



	March 29, 2015								March 30, 2014
(In thousands)		Amortized Cost		Fair Value		Unrealized Gain/(loss)			Amortized Cost		Fair Value		Unrealized Gain/(loss)
Within one year		$	14,491	$	14,485	$	(6	)	$	13,864	$	13,843	$	(21	)
Between one and three years		17,285		17,249		(36		)	15,890		15,852		(38		)
Total available-for-sale securities		$	31,776	$	31,734	$	(42	)	$	29,754	$	29,695	$	(59	)

Realized gains and losses were not material for fiscal 2015, 2014 and 2013.

Goodwill and Intangible Assets

12 Months Ended

Mar. 29, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

Goodwill and Other Identifiable Intangible Assets

The changes in the carrying amount of goodwill were as follows:



(In thousands)	Amount
Balance as of March 31, 2013	$	6,495
ACS Acquisition	897
Balance as of March 30, 2014	7,392
Dumont Acquisition	4,358
Balance as of March 29, 2015	$	11,750

The increases in goodwill shown above have been recorded as part of our Water Treatment segment.

The following is a summary of our intangible assets as of March 29, 2015 and March 30, 2014:



	2015							2014
	Gross Amount		Accumulated Amortization			Net		Gross Amount		Accumulated Amortization			Net
(In thousands)
Finite-life intangible assets:
Customer relationships	$	9,723	$	(1,697	)	$	8,026	$	6,913	$	(1,292	)	$	5,621
Trademarks and trade names	2,034		(667		)	1,367		1,335		(421		)	914
Trade secrets	962		(896		)	66		962		(768		)	194
Carrier relationships	800		(337		)	463		800		(257		)	543
Other finite-life intangible assets	341		(336		)	5		341		(331		)	10
Total finite-life intangible assets	13,860		(3,933		)	9,927		10,351		(3,069		)	7,282
Indefinite-life intangible assets	1,227		—			1,227		1,227		—			1,227
Total intangible assets, net	$	15,087	$	(3,933	)	$	11,154	$	11,578	$	(3,069	)	$	8,509

Intangible asset amortization expense was $0.9 million during fiscal 2015, $0.7 million during fiscal 2014, and $0.6 million during fiscal 2013.

The estimated future amortization expense for identifiable intangible assets during the next five years is as follows:



(In thousands)	2016		2017		2018		2019		2020
Estimated amortization expense	$	932	$	885	$	873	$	791	$	690

Share Based Compensation

12 Months Ended

Mar. 29, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-Based Compensation

Performance-Based Restricted Stock Units. Our Board of Directors has approved a performance-based equity compensation arrangement for our executive officers. This performance-based arrangement provides for the grant of performance-based restricted stock units that represent a possible future issuance of restricted shares of our common stock based on our pre-tax income target for the applicable fiscal year. The actual number of restricted shares to be issued to each executive officer will be determined when our final financial information becomes available after the applicable fiscal year and will be between zero shares and 50,874 shares in the aggregate for fiscal 2015. The restricted shares issued will fully vest two years after the last day of the fiscal year on which the performance is based. We are recording the compensation expense for the outstanding performance share units and then-converted restricted stock over the life of the awards.

The following table represents the restricted stock activity for fiscal 2015:



	Shares		Weighted- Average Grant Date Fair Value
Outstanding at beginning of year	52,104		$	36.99
Granted	24,932		34.45
Vested	(23,300	)	33.01
Forfeited or expired	(156	)	33.01
Outstanding at end of year	53,580		$	37.55

The weighted average grant date fair value of restricted shares issued in fiscal 2015, 2014 and 2013 was $34.45, $40.25, and $33.01, respectively. We recorded compensation expense on performance-based restricted stock of approximately $1.1 million for fiscal 2015, $0.8 million for fiscal 2014 and $1.1 million for fiscal 2013, substantially all of which was recorded in selling, general and administrative (“SG&A”) expense in the Consolidated Statements of Income. The total fair value of performance-based restricted stock units vested in fiscal 2015 was $0.8 million compared to $1.3 million in fiscal 2014 and zero in fiscal 2013.

Until the performance-based restricted stock units result in the issuance of restricted stock, the amount of expense recorded each period is dependent upon our estimate of the number of shares that will ultimately be issued and our then current common stock price. Upon issuance of restricted stock, we record compensation expense over the remaining vesting period using the award date closing price. Unrecognized compensation expense related to non-vested restricted stock and non-vested restricted share units as of March 29, 2015 was $1.0 million and is expected to be recognized over a weighted average period of 1.1 years .

The benefits of tax deductions in excess of recognized compensation costs from share-based compensation are recorded as a change in additional paid-in capital rather than a deduction of taxes paid. The amount of excess tax benefit (expense) recognized and recorded in additional paid-in capital resulting from share-based compensation cost was $0.1 million in fiscal 2015, $(0.2) million in fiscal 2014 and $0.5 million in 2013.

Restricted Stock Awards. As part of their retainer, the non-employee directors receive restricted stock for their Board services. The restricted stock awards are expensed over the requisite vesting period, which begins on the date of issuance and ends on the date of the next Annual Meeting of Shareholders, based on the market value on the date of grant. The following table represents the Board’s restricted stock activity for fiscal 2015:



	Shares		Weighted- Average Grant Date Fair Value
Outstanding at beginning of period	6,055		$	40.42
Granted	7,077		34.61
Vested	(6,055	)	40.42
Forfeited or expired	—		—
Outstanding at end of period	7,077		$	34.61

Annual expense related to the value of restricted stock was $0.2 million for each of fiscal 2015, 2014 and 2013, all of which was recorded in SG&A expense in the Consolidated Statements of Income. Unrecognized compensation expense related to non-vested restricted stock awards as of March 29, 2015 was $0.1 million and is expected to be recognized over a weighted average period of 0.3 years.

Stock Option Awards. Our Board of Directors (the “Board”) previously approved a long-term incentive equity compensation arrangement for our executive officers that provided for the grant of non-qualified stock options that vested at the end of a three-year period, although no stock options have been granted under this arrangement since the fiscal year ended March 28, 2010. During fiscal 2015, 9,333 options were exercised with an exercise price of $19.90. As of March 29, 2015 we had no stock options outstanding. No expense was recorded in fiscal 2015, 2014 or 2013 related to the value of stock options.

Profit Sharing, Employee Stock Ownership, Employee Stock Purchase and Pension Plans

12 Months Ended

Mar. 30, 2014

Compensation and Retirement Disclosure [Abstract]

Profit Sharing, Employee Stock Ownership Plan, Employee Stock Purchase Plan and Defined Contribution Pension Plan Contribution Expense

Profit Sharing, Employee Stock Ownership, Employee Stock Purchase and Pension Plans

Company sponsored plans. Substantially all of our non-bargaining unit employees are eligible to participate in a company sponsored profit sharing plan. Contributions are made at our discretion subject to a maximum amount allowed under the Internal Revenue Code. The profit sharing plan contribution level for each employee depends upon date of hire, with those employees hired after April 1, 2012 eligible to receive a contribution that is 50% of the contribution made for employees hired on or before April 1, 2012. Our contribution to the profit sharing plan for fiscal 2015, fiscal 2014 and fiscal 2013 was 5% of each employee’s eligible compensation for employees hired on or before April 1, 2012. In addition to the discretionary employer contribution described above, the profit sharing plan includes a 401(k) plan that allows employees to contribute pre-tax earnings up to the maximum amount allowed under the Internal Revenue Code, with an employer match of up to 5% of the employee’s eligible compensation.

We have an employee stock ownership plan (“ESOP”) covering substantially all of our non-bargaining unit employees. Contributions are made at our discretion subject to a maximum amount allowed under the Internal Revenue Code. The ESOP contribution level for each employee depends upon date of hire, with those employees hired after April 1, 2012 eligible to receive a contribution that is 50% of the contribution made for employees hired on or before April 1, 2012. Our contribution to the ESOP for fiscal 2015, fiscal 2014 and fiscal 2013 was 5% of each employee’s eligible compensation for employees hired on or before April 1, 2012.

We have an employee stock purchase plan (“ESPP”) covering substantially all of our employees. The ESPP allows employees to purchase newly-issued shares of the Company’s common stock at a discount from market. The number of new shares issued under the plan was 31,383 in fiscal 2015, 28,214 in fiscal 2014 and 30,434 in fiscal 2013.

In March 2013, concurrent with our withdrawal from a multiemployer pension plan described below, we established a retirement plan and ESOP for our collective bargaining unit employees. Each of these plans is subject to a maximum amount allowed under the Internal Revenue Code. The retirement plan provides for a contribution of 5% of each employee’s eligible wages annually for employees who were eligible to enter the plan on March 1, 2013 and a contribution of 2.5% of each employee’s eligible wages annually for employees who entered the plan subsequent to March 1, 2013. Additionally, the retirement plan includes a 401(k) plan that will allow employees to contribute pre-tax earnings up to the maximum amount allowed under the Internal Revenue Code, with an employer match of up to 5% of the employee’s eligible compensation. The ESOP provides for contributions of 5% of each employee’s eligible wages annually for employees who were eligible to enter the plan on March 1, 2013, and a contribution of 2.5% of each employee’s eligible wages annually for employees who enter the plan subsequent to March 1, 2013.

The following represents the contribution expense for the company sponsored profit sharing, ESOP, ESPP and 401(k) plans for fiscal 2015, 2014 and 2013:



Benefit Plan	2015		2014		2013
(In thousands)
Non-bargaining unit employee plans:
Profit sharing	$	1,266	$	1,231	$	1,204
401(K) matching contributions	1,216		980		1,206
ESOP	1,266		1,231		1,203
Bargaining unit employee plans	450		500		—
ESPP - all employees	253		257		289
Total contribution expense	$	4,451	$	4,199	$	3,902

Multiemployer pension plan. In fiscal 2013, we concluded negotiations with two collective bargaining units to discontinue our participation in the Central States, Southeast and Southwest Areas Pension Fund (“CSS” or “the plan”), a collectively bargained multiemployer pension plan, and as a result we recorded a pre-tax charge of $7.2 million ($4.5 million after tax, or $0.43 per fully diluted share). This charge represents the discounted value of our estimated withdrawal payment obligation and was recorded as a charge to cost of sales in our Industrial segment in fiscal 2013.

Payment of our share of the unfunded vested benefit liability will be made over 20 years and is subject to a cap. At the end of the 20-year period we will have no further liability, even if our share of the unfunded vested benefit liability has not yet been paid in full. The cash payments to be made total approximately $9.3 million, or $467,000 per year. Our payments began in the third quarter of fiscal 2014.

We made contributions to CSS of approximately $0.4 million in fiscal 2013 prior to discontinuing our participation in the plan. No contributions were made to CSS for fiscal 2014 or fiscal 2015.

Commitments and Contingencies

12 Months Ended

Mar. 29, 2015

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Leases — We have various operating leases for buildings and land on which some of our operations are located as well as trucks utilized for deliveries in certain branches. Future minimum lease payments due under operating leases with an initial term of one year or more at March 29, 2015 are as follows:



(In thousands)	2016		2017		2018		2019		2020		Thereafter
Minimum lease payment	$	2,139	$	1,916	$	1,740	$	1,555	$	1,388	$	4,198

Total rental expense for fiscal years 2015, 2014 and 2013 was as follows:



	2015		2014		2013
(In thousands)
Minimum rentals	$	1,665	$	1,223	$	818
Contingent rentals	103		110		110
Total rental expense	$	1,768	$	1,333	$	928

Litigation - As of March 30, 2014 there were no material pending legal proceedings, other than ordinary routine litigation incidental to the business, to which we or any of our subsidiaries are a party or of which any of our property is the subject. Legal fees associated with such matters are expensed as incurred.

In the first quarter of fiscal 2013, we entered into a settlement agreement with a chemical supplier to us, pursuant to which we mutually resolved the previously disclosed litigation and all disputes among us. The settlement agreement provided for a cash payment by us to the supplier and provided that both parties enter into new contracts for the supply by the supplier of certain chemicals to us. Our obligations under the settlement agreement resulted in a $3.2 million charge to pre-tax income recorded in cost of sales (approximately $2.0 million after tax, or $0.19 per fully diluted share) in the first quarter of fiscal 2013.

Asset Retirement Obligations - We have three leases of land which contain terms that state that at the end of the lease term (currently 2023 for one lease and 2018 for the other two leases), we have a specified amount of time to remove the property and buildings. At that time, anything that remains on the land becomes the property of the lessor, and the lessor has the option to either maintain the property or remove the property at our expense. We are currently negotiating extensions for a period of 15-20 years for the two leases which expire in 2018. We have not been able to reasonably estimate the fair value of the asset retirement obligations, primarily due to the combination of the following factors: The leases do not expire in the near future; we have a history of extending the leases with the lessors and currently intend to do so at expiration of the lease periods; the lessors do not have a history of terminating leases with their tenants; and because it is more likely than not that the buildings will have value at the end of the lease life and therefore, may not be removed by either the lessee or the lessor. Therefore, in accordance with accounting guidance related to asset retirement and environmental obligations, we have not recorded an asset retirement obligation as of March 29, 2015. We will continue to monitor the factors surrounding the requirement to record an asset retirement obligation and will recognize the fair value of a liability in the period in which it is incurred and a reasonable estimate can be made.

Income Taxes

12 Months Ended

Mar. 29, 2015

Income Tax Disclosure [Abstract]

Income Taxes

The provisions for income taxes for fiscal 2015, 2014 and 2013 are as follows:



	2015			2014		2013
(In thousands)
Federal — current	$	9,574		$	7,612	$	8,967
State — current	2,133			1,255		2,417
Total current	11,707			8,867		11,384

Federal — deferred	(517		)	676		(2,466		)
State — deferred	50			424		(600		)
Total deferred	(467		)	1,100		(3,066		)
Total provision	$	11,240		$	9,967	$	8,318

Our effective tax rate for fiscal 2014 was reduced by a non-recurring state tax benefit of $0.4 million. During fiscal 2013, we amended previously filed U.S. Federal tax returns resulting in an increase of $0.8 million in the benefits related to the domestic manufacturing deduction and investment tax credits, which reduced our tax rate for that year. Reconciliations of the provisions for income taxes, based on income from continuing operations, to the applicable federal statutory income tax rate of 35% are listed below.



	2015		2014		2013
Statutory federal income tax	35.0	%	35.0	%	35.0	%
State income taxes, net of federal deduction	4.7	%	3.2	%	4.9	%
ESOP dividend deduction on allocated shares	(0.7	)%	(0.8	)%	(1.0	)%
Domestic production deduction	(2.4	)%	(2.1	)%	(2.7	)%
Impact of amended tax returns	—	%	—	%	(3.3	)%
Other — net	0.3	%	0.2	%	(0.2	)%
Total	36.9	%	35.5	%	32.7	%

The tax effects of items comprising our net deferred tax asset (liability) as of March 29, 2015 and March 30, 2014 are as follows:



(In thousands)	2015			2014
Deferred tax assets:
Trade receivables	$	178		$	191
Stock compensation accruals	949			1,031
Pension withdrawal liability	2,755			2,872
Other	811			842
Total deferred tax assets	$	4,693		$	4,936
Deferred tax liabilities:
Inventories	$	(3,307	)	$	(3,618	)
Prepaid	(689		)	(727		)
Excess of tax over book depreciation	(12,699		)	(13,221		)
Amortization of intangibles	(674		)	(456		)
Total deferred tax liabilities	$	(17,369	)	$	(18,022	)
Net deferred tax liabilities	$	(12,676	)	$	(13,086	)

As of March 29, 2015, the Company has determined that it is more likely than not that the deferred tax assets at March 29, 2015 will be realized either through future taxable income or reversals of taxable temporary differences. As of March 29, 2015 and March 30, 2014, there were no unrecognized tax benefits. Accordingly, a tabular reconciliation from beginning to ending periods is not provided.

We are subject to U.S. federal income tax as well as income tax of multiple state jurisdictions. The tax years prior to our fiscal year ended March 29, 2009 are closed to examination by the Internal Revenue Service, and with few exceptions, state and local income tax jurisdictions.

Segment Information

12 Months Ended

Mar. 29, 2015

Segment Reporting [Abstract]

Segment Information

We have two reportable segments: Industrial and Water Treatment. The accounting policies of the segments are the same as those described in the summary of significant accounting policies. Product costs and expenses for each segment are based on actual costs incurred along with cost allocations of shared and centralized functions. We evaluate performance based on profit or loss from operations before income taxes not including nonrecurring gains and losses. Reportable segments are defined primarily by product and type of customer. Segments are responsible for the sales, marketing and development of their products and services. The segments do not have separate accounting, administration, customer service or purchasing functions. There are no intersegment sales and no operating segments have been aggregated. Given the nature of our business, it is not practical to disclose revenues from external customers for each product or each group of similar products. No single customer’s revenues amounted to 10% or more of our total revenue. Sales are primarily within the United States and all assets are located within the United States.



Reportable Segments	Industrial		Water Treatment		Total
(In thousands)
Fiscal Year Ended March 29, 2015:
Sales	$	249,066	$	114,957	$	364,023
Gross profit	33,619		32,172		65,791
Selling, general, and administrative expenses	19,793		15,582		35,375
Operating income	13,826		16,590		30,416
Identifiable assets*	$	151,157	$	42,860	$	194,017
Fiscal Year Ended March 30, 2014:
Sales	$	244,888	$	103,375	$	348,263
Gross profit	32,041		29,559		61,600
Selling, general, and administrative expenses	19,781		13,729		33,510
Operating income	12,260		15,830		28,090
Identifiable assets*	$	141,506	$	29,001	$	170,507
Fiscal Year Ended March 31, 2013:
Sales	$	248,556	$	101,831	$	350,387
Gross profit	28,878		28,058		56,936
Selling, general, and administrative expenses	19,923		11,683		31,606
Operating income	8,955		16,375		25,330
Identifiable assets*	$	143,827	$	25,448	$	169,275

* Unallocated assets, consisting primarily of cash and cash equivalents, investments and prepaid expenses, were $53.7 million at March 29, 2015, $66.7 million at March 30, 2014 and $52.9 million at March 31, 2013.

In fiscal 2013, gross profit for our Industrial segment was negatively impacted by a $7.2 million (pre-tax) charge related to our withdrawal from a multiemployer pension plan (see Note 9 for further discussion) as well as a $3.2 million (pre-tax) charge related to a legal settlement (see Note 10 for further discussion).

Nature of Business and Significant Accounting Policies (Policies)	12 Months Ended
	Mar. 29, 2015
Accounting Policies [Abstract]
Fiscal Year	Our fiscal year is a 52/53-week year ending on the Sunday closest to March 31. Our fiscal years ended March 29, 2015 (“fiscal 2015”), March 30, 2014 (“fiscal 2014”), and March 31, 2013 (“fiscal 2013”) were 52 weeks. The fiscal year ending April 3, 2016 (“fiscal 2016”) will be 53 weeks.
Principles of Consolidation	The consolidated financial statements include the accounts of Hawkins, Inc. and its wholly-owned subsidiaries. All intercompany transactions and accounts have been eliminated.
Estimates	The preparation of financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reported period. Actual results could differ from those estimates.
Revenue Recognition	We recognize revenue when there is evidence that the customer has agreed to purchase the product, the price and terms of the sale are fixed, the product has shipped and title has passed to our customer, performance has occurred, and collection of the receivable is reasonably assured.
Shipping and Handling	All shipping and handling amounts billed to customers are included in revenues. Costs incurred related to the shipping and the handling of products are included in cost of sales.
Fair Value Measurements	The financial assets and liabilities that are re-measured and reported at fair value for each reporting period include marketable securities, as well as contingent consideration payable related to the acquisition of Advance Chemical Solutions, Inc. (“ACS”). There are no fair value measurements with respect to nonfinancial assets or liabilities that are recognized or disclosed at fair value in our consolidated financial statements on a recurring basis. Assets and liabilities measured at fair value are classified using the following hierarchy, which is based upon the transparency of inputs to the valuation as of the measurement date: Level 1: Valuation is based on observable inputs such as quoted market prices (unadjusted) for identical assets or liabilities in active markets. Level 2: Valuation is based on inputs such as quoted market prices for similar assets or liabilities in active markets or other inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument. Level 3: Valuation is based upon other unobservable inputs that are significant to the fair value measurement. In making fair value measurements, observable market data must be used when available. When inputs used to measure fair value fall within different levels of the hierarchy, the level within which the fair value measurement is categorized is based on the lowest level input that is significant to the fair value measurement.
Cash Equivalents	Cash equivalents include all liquid debt instruments (primarily cash funds and money market accounts) purchased with an original maturity of three months or less. The balances maintained at financial institutions may, at times, exceed federally insured limits.
Investments	Available-for-sale securities consist of certificates of deposit (“CD’s”) and municipal bonds and are valued at current market value, with the resulting unrealized gains and losses excluded from earnings and reported, net of tax, as a separate component of shareholders’ equity until realized. Any impairment loss to reduce an investment’s carrying amount to its fair market value is recognized in income when a decline in the fair market value of an individual security below its cost or carrying value is determined to be other than temporary.
Trade Receivables	Financial instruments, which potentially subject us to a concentration of credit risk, principally consist of trade receivables. We sell our principal products to a large number of customers in many different industries. There are no concentrations of credit risk with a single customer from a particular service or geographic area that would significantly impact us in the near term. To reduce credit risk, we routinely assess the financial strength of our customers. We record an allowance for doubtful accounts to reduce our receivables to an amount we estimate is collectible from our customers. Estimates used in determining the allowance for doubtful accounts are based on historical collection experience, current trends, aging of accounts receivable and periodic evaluations of our customers’ financial condition. We invest our excess cash balances at times in CD’s, municipal bonds and money market accounts at two separate financial institutions where the cash balances may exceed federally insured limits. The institutions are two of the largest commercial banking institutions in the country and both have maintained strong credit ratings.
Inventories	Inventories, consisting primarily of finished goods, are primarily valued at the lower of cost or net realizable value, with cost for the vast majority of our inventory determined using the last-in, first-out (“LIFO”) method. The amount of inventory valued using the first-in, first-out (“FIFO”) method represents approximately 8% of the total FIFO inventory balance at March 29, 2015.
Property, Plant and Equipment	Property is stated at cost and depreciated or amortized over the lives of the assets, using the straight-line method. Estimated lives are: 10 to 40 years for buildings and improvements; 3 to 20 years for machinery and equipment; 3 to 10 years for transportation equipment; and 3 to 10 years for office furniture and equipment including computer systems. Leasehold improvements are depreciated over the lesser of their estimated useful lives or the remaining lease term. Significant improvements that add to productive capacity or extend the lives of properties are capitalized. Costs for repairs and maintenance are charged to expense as incurred. When property is retired or otherwise disposed of, the cost and related accumulated depreciation or amortization are removed from the accounts and any related gains or losses are included in income. We review the recoverability of long-lived assets to be held and used, such as property, plant and equipment, when events or changes in circumstances occur that indicate the carrying value of the asset group may not be recoverable, such as prolonged industry downturn or significant reductions in projected future cash flows. The assessment of possible impairment is based on our ability to recover the carrying value of the asset group from the expected future pre-tax cash flows (undiscounted) of the related operations. If these cash flows are less than the carrying value of such asset group, an impairment loss would be measured by the amount the carrying value exceeds the fair value of the long-lived asset group. The measurement of impairment requires us to estimate future cash flows and the fair value of long-lived assets. No long-lived assets were determined to be impaired during fiscal years 2015, 2014 or 2013.
Goodwill and Identifiable Intangible Assets	Goodwill represents the excess of the cost of acquired businesses over the fair value of identifiable tangible net assets and identifiable intangible assets purchased. Goodwill is tested at least annually for impairment, and is tested for impairment more frequently if events or changes in circumstances indicate that the asset might be impaired. As of January 1, 2015, the company performed an analysis of qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount as a basis for determining whether it is necessary to perform a two-step goodwill impairment test. Based on management’s analysis of qualitative factors, we determined that it was not necessary to perform a two-step goodwill impairment test for either reporting unit. Our primary identifiable intangible assets include customer lists, trade secrets, non-compete agreements, trademarks, and trade names acquired in previous business acquisitions. Identifiable intangible assets with finite lives are amortized whereas identifiable intangible assets with indefinite lives are not amortized. The values assigned to the intangible assets with finite lives are being amortized on average over approximately 13 years. Identifiable intangible assets that are subject to amortization are evaluated for impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. Identifiable intangible assets not subject to amortization are tested for impairment annually or more frequently if events warrant. The impairment test consists of a qualitative assessment to determine whether it is more likely than not that the asset is impaired. Based on management’s analysis of qualitative factors, we determined that it was not necessary to perform a quantitative impairment test for fiscal 2015. Impairment assessments were also completed in the fourth quarters of fiscal 2014 and 2013, which resulted in no impairment charges for either of these fiscal years.
Income Taxes	In the preparation of our consolidated financial statements, the calculation of income taxes by management is based upon the estimated effective rate applicable to operating results for the full fiscal year. This includes estimating the current tax liability as well as assessing differences resulting from different treatment of items for tax and book accounting purposes. Differences that are temporary in nature result in deferred tax assets and liabilities, which are recorded on the balance sheet, while differences that are permanent in nature impact the income tax expense recorded on the income statement and impact the effective tax rate for the fiscal year. The deferred tax assets and liabilities are analyzed regularly and management assesses the likelihood that deferred tax assets will be recovered from future taxable income. We record any interest and penalties related to income taxes as income tax expense in the statements of income. The effect of income tax positions are recognized only if those positions are more likely than not of being sustained. Changes in recognition or measurement are made as facts and circumstances change.
Stock-Based Compensation	We account for stock-based compensation on a fair value basis. The estimated grant date fair value of each stock-based award is recognized in expense over the requisite service period (generally the vesting period). Non-vested share awards are recorded as expense over the requisite service periods based on the market value on the date of grant.
Earnings Per Share	Basic earnings per share (“EPS”) are computed by dividing net income by the weighted-average number of common shares outstanding. Diluted EPS are computed by dividing net income by the weighted-average number of common shares outstanding including the incremental shares assumed to be issued upon the exercise of stock options and the incremental shares assumed to be issued as performance units and restricted stock.
Derivatives Instruments and Hedging Activities	We do not have any freestanding or embedded derivatives and it is our practice to not enter into contracts that contain them.

Business Combinations (Tables) (The Dumont Company, Inc [Member])

12 Months Ended

Mar. 29, 2015

The Dumont Company, Inc [Member]

Business Acquisition [Line Items]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]

The following table summarizes the preliminary allocation of the purchase price to the fair values assigned to the assets acquired and liabilities assumed at the date of the Dumont acquisition:



(In thousands)	Amount
Accounts receivable	$	1,358
Inventory	859
Other assets	159
Property, plant, and equipment	702
Intangible assets	3,509
Current liabilities	(877		)
Net assets acquired	5,710
Goodwill	4,358
Total purchase price	$	10,068

Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]

The preliminary allocation of the purchase price to the assets acquired and liabilities assumed resulted in the recognition of the following intangible assets:



(In thousands)	Amount		Life (in years)
Customer relationships	$	2,810	20
Trade name	699		4
	$	3,509

Cash and Cash Equivalents and Investments (Tables)

12 Months Ended

Mar. 29, 2015

Cash and Cash Equivalents [Abstract]

Summary of financial assets and liabilities measured at fair value



Description	March 29, 2015		Level 1		Level 2		Level 3
(In thousands)	March 29, 2015		Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents	$	18,639	$	18,639	$	—	$	—
Certificates of deposit	29,136		—		29,136		—
Municipal Bonds	2,598		—		2,598		—

Description	March 30, 2014		Level 1		Level 2		Level 3
(In thousands)	March 30, 2014		Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents	$	33,486	$	33,486	$	—	$	—
Certificates of deposit	24,437		—		24,437		—
Municipal Bonds	5,258		—		5,258		—

Available-for-sale securities

The contractual maturities of available-for-sale securities at March 29, 2015 and March 30, 2014 are shown in the table below:



	March 29, 2015								March 30, 2014
(In thousands)		Amortized Cost		Fair Value		Unrealized Gain/(loss)			Amortized Cost		Fair Value		Unrealized Gain/(loss)
Within one year		$	14,491	$	14,485	$	(6	)	$	13,864	$	13,843	$	(21	)
Between one and three years		17,285		17,249		(36		)	15,890		15,852		(38		)
Total available-for-sale securities		$	31,776	$	31,734	$	(42	)	$	29,754	$	29,695	$	(59	)

Goodwill and Intangible Assets (Tables)

12 Months Ended

Mar. 29, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of goodwill

The changes in the carrying amount of goodwill were as follows:



(In thousands)	Amount
Balance as of March 31, 2013	$	6,495
ACS Acquisition	897
Balance as of March 30, 2014	7,392
Dumont Acquisition	4,358
Balance as of March 29, 2015	$	11,750

Summary of intangible assets

The following is a summary of our intangible assets as of March 29, 2015 and March 30, 2014:



	2015							2014
	Gross Amount		Accumulated Amortization			Net		Gross Amount		Accumulated Amortization			Net
(In thousands)
Finite-life intangible assets:
Customer relationships	$	9,723	$	(1,697	)	$	8,026	$	6,913	$	(1,292	)	$	5,621
Trademarks and trade names	2,034		(667		)	1,367		1,335		(421		)	914
Trade secrets	962		(896		)	66		962		(768		)	194
Carrier relationships	800		(337		)	463		800		(257		)	543
Other finite-life intangible assets	341		(336		)	5		341		(331		)	10
Total finite-life intangible assets	13,860		(3,933		)	9,927		10,351		(3,069		)	7,282
Indefinite-life intangible assets	1,227		—			1,227		1,227		—			1,227
Total intangible assets, net	$	15,087	$	(3,933	)	$	11,154	$	11,578	$	(3,069	)	$	8,509

Schedule of future amortization expense

The estimated future amortization expense for identifiable intangible assets during the next five years is as follows:



(In thousands)	2016		2017		2018		2019		2020
Estimated amortization expense	$	932	$	885	$	873	$	791	$	690

Share Based Compensation (Tables)

12 Months Ended

Mar. 29, 2015

Performance-Based Restricted Stock [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of performance-based restricted stock units

The following table represents the restricted stock activity for fiscal 2015:



	Shares		Weighted- Average Grant Date Fair Value
Outstanding at beginning of year	52,104		$	36.99
Granted	24,932		34.45
Vested	(23,300	)	33.01
Forfeited or expired	(156	)	33.01
Outstanding at end of year	53,580		$	37.55

Restricted Stock Awards [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of restricted stock awards

The following table represents the Board’s restricted stock activity for fiscal 2015:



	Shares		Weighted- Average Grant Date Fair Value
Outstanding at beginning of period	6,055		$	40.42
Granted	7,077		34.61
Vested	(6,055	)	40.42
Forfeited or expired	—		—
Outstanding at end of period	7,077		$	34.61

Income Taxes (Tables)

12 Months Ended

Mar. 29, 2015

Income Tax Disclosure [Abstract]

Schedule of provisions for income taxes

The provisions for income taxes for fiscal 2015, 2014 and 2013 are as follows:



	2015			2014		2013
(In thousands)
Federal — current	$	9,574		$	7,612	$	8,967
State — current	2,133			1,255		2,417
Total current	11,707			8,867		11,384

Federal — deferred	(517		)	676		(2,466		)
State — deferred	50			424		(600		)
Total deferred	(467		)	1,100		(3,066		)
Total provision	$	11,240		$	9,967	$	8,318

Schedule of effective income tax rate reconciliation

Reconciliations of the provisions for income taxes, based on income from continuing operations, to the applicable federal statutory income tax rate of 35% are listed below.



	2015		2014		2013
Statutory federal income tax	35.0	%	35.0	%	35.0	%
State income taxes, net of federal deduction	4.7	%	3.2	%	4.9	%
ESOP dividend deduction on allocated shares	(0.7	)%	(0.8	)%	(1.0	)%
Domestic production deduction	(2.4	)%	(2.1	)%	(2.7	)%
Impact of amended tax returns	—	%	—	%	(3.3	)%
Other — net	0.3	%	0.2	%	(0.2	)%
Total	36.9	%	35.5	%	32.7	%

Schedule of deferred tax assets and liabilities

The tax effects of items comprising our net deferred tax asset (liability) as of March 29, 2015 and March 30, 2014 are as follows:



(In thousands)	2015			2014
Deferred tax assets:
Trade receivables	$	178		$	191
Stock compensation accruals	949			1,031
Pension withdrawal liability	2,755			2,872
Other	811			842
Total deferred tax assets	$	4,693		$	4,936
Deferred tax liabilities:
Inventories	$	(3,307	)	$	(3,618	)
Prepaid	(689		)	(727		)
Excess of tax over book depreciation	(12,699		)	(13,221		)
Amortization of intangibles	(674		)	(456		)
Total deferred tax liabilities	$	(17,369	)	$	(18,022	)
Net deferred tax liabilities	$	(12,676	)	$	(13,086	)

Segment Information (Tables)

12 Months Ended

Mar. 29, 2015

Segment Reporting [Abstract]

Summary of Segment Information

Sales are primarily within the United States and all assets are located within the United States.



Reportable Segments	Industrial		Water Treatment		Total
(In thousands)
Fiscal Year Ended March 29, 2015:
Sales	$	249,066	$	114,957	$	364,023
Gross profit	33,619		32,172		65,791
Selling, general, and administrative expenses	19,793		15,582		35,375
Operating income	13,826		16,590		30,416
Identifiable assets*	$	151,157	$	42,860	$	194,017
Fiscal Year Ended March 30, 2014:
Sales	$	244,888	$	103,375	$	348,263
Gross profit	32,041		29,559		61,600
Selling, general, and administrative expenses	19,781		13,729		33,510
Operating income	12,260		15,830		28,090
Identifiable assets*	$	141,506	$	29,001	$	170,507
Fiscal Year Ended March 31, 2013:
Sales	$	248,556	$	101,831	$	350,387
Gross profit	28,878		28,058		56,936
Selling, general, and administrative expenses	19,923		11,683		31,606
Operating income	8,955		16,375		25,330
Identifiable assets*	$	143,827	$	25,448	$	169,275

Nature of Business and Significant Accounting Policies (Details)	12 Months Ended
	Mar. 29, 2015 Segment	Mar. 30, 2014	Mar. 31, 2013	Apr. 01, 2012
Property, Plant and Equipment [Line Items]
Number of reportable segments (segment)	2
Number of days in fiscal year	364 days		364 days	364 days
Number of days in next fiscal year	371 days
Percentage of FIFO inventory (percent)	8.00%
Weighted-average common shares outstanding-basic (shares)	10,568,582	10,544,467	10,464,820
Dilutive impact of stock options, performance units, and restricted stock (shares)	64,972	55,288	76,322
Weighted average common shares outstanding — diluted (shares)	10,633,554	10,599,755	10,541,142
Weighted average number diluted shares outstanding adjustment	0		0	0
Maximum [Member]
Property, Plant and Equipment [Line Items]
Number of days in fiscal year	371 days
Minimum [Member]
Property, Plant and Equipment [Line Items]
Number of days in fiscal year	364 days
Average [Member]
Property, Plant and Equipment [Line Items]
Finite-lived intangible asset, useful life	13 years
Building and Building Improvements [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives	40 years
Building and Building Improvements [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives	10 years
Machinery and Equipment [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives	20 years
Machinery and Equipment [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives	3 years
Transportation Equipment [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives	10 years
Transportation Equipment [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives	3 years
Office Furniture, Office Equipment and Computer Systems [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives	10 years
Office Furniture, Office Equipment and Computer Systems [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives	3 years

Business Combinations (Details) (USD $)	12 Months Ended			0 Months Ended	12 Months Ended	0 Months Ended	12 Months Ended		0 Months Ended
Business Combinations (Details) (USD $)	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013	Oct. 20, 2014 The Dumont Company, Inc [Member]	Mar. 29, 2015 The Dumont Company, Inc [Member]	Oct. 01, 2013 Advance Chemical Solutions, Inc. [Member]	Mar. 29, 2015 Advance Chemical Solutions, Inc. [Member]	Sep. 29, 2013 Advance Chemical Solutions, Inc. [Member]	Oct. 20, 2014 Customer Relationships [Member] The Dumont Company, Inc [Member]	Oct. 20, 2014 Trade Names [Member] The Dumont Company, Inc [Member]
Business Acquisition [Line Items]
Accounts receivable					$ 1,358,000
Inventory					859,000
Other assets					159,000
Property, plant, and equipment					702,000
Intangible assets				3,509,000	3,509,000				2,810,000	699,000
Current liabilities					(877,000)
Net assets acquired					5,710,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life									20 years	4 years
Goodwill					4,358,000
Total purchase price	10,068,000	2,416,000	100,000	10,068,000	10,068,000	2,400,000	400,000
Contingent consideration measurement period						2 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net						2,800,000
Revenue reported by acquired entity for last annual period				14,000,000				4,000,000
Potential Earnout						$ 500,000

Cash and Cash Equivalents and Investments (Details) (USD $) In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014
Cash [Member]
Assets:
Cash/Certificates of deposit/Money market securities	$ 18,639	$ 33,486
Certificates of deposit [Member]
Assets:
Cash/Certificates of deposit/Money market securities	29,136	24,437
Municipal Bonds [Member]
Assets:
Cash/Certificates of deposit/Money market securities	2,598	5,258
Level 1 [Member] \| Cash [Member]
Assets:
Cash/Certificates of deposit/Money market securities	18,639	33,486
Level 1 [Member] \| Certificates of deposit [Member]
Assets:
Cash/Certificates of deposit/Money market securities	0	0
Level 1 [Member] \| Money market securities [Member]
Assets:
Cash/Certificates of deposit/Money market securities	0	0
Level 2 [Member] \| Cash [Member]
Assets:
Cash/Certificates of deposit/Money market securities	0	0
Level 2 [Member] \| Certificates of deposit [Member]
Assets:
Cash/Certificates of deposit/Money market securities	29,136	24,437
Level 2 [Member] \| Municipal Bonds [Member]
Assets:
Cash/Certificates of deposit/Money market securities	2,598	5,258
Level 3 [Member] \| Cash [Member]
Assets:
Cash/Certificates of deposit/Money market securities	0	0
Level 3 [Member] \| Certificates of deposit [Member]
Assets:
Cash/Certificates of deposit/Money market securities	0	0
Level 3 [Member] \| Money market securities [Member]
Assets:
Cash/Certificates of deposit/Money market securities	$ 0	$ 0

Cash and Cash Equivalents and Investments-Textual (Details) (USD $) In Thousands, unless otherwise specified				12 Months Ended
	Mar. 29, 2015	Mar. 30, 2014	Mar. 29, 2015 Certificates of Deposit and Municipal Bonds [Member]	Mar. 29, 2015 Level 2 [Member] Certificates of deposit [Member]
Cash and Cash Equivalents and Investments (Additional Textual) [Abstract]
Maturities period of certificates of deposit minimum				3 months
Maturities period of certificates of deposit maximum				3 years
Current asset fair value	$ 14,485	$ 13,843	$ 14,500
Noncurrent asset fair value	$ 17,249	$ 15,852	$ 17,200

Cash and Cash Equivalents and Investments-Available for sale securities (Details) (USD $) In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014
Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Within one year	$ 14,491	$ 13,864
Between one and three years	17,285	15,890
Total available-for-sale securities	31,776	29,754
Fair Value, Fiscal Year Maturity [Abstract]
Within one year	14,485	13,843
Between one and three years	17,249	15,852
Total available-for-sale securities	31,734	29,695
Unrealized Gain (loss) [Abstract]
Total available-for-sale securities	(42)	(59)
Within one year	(6)	(21)
Between one and three years	$ (36)	$ (38)

Goodwill and Intangible Assets-Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014
Finite-life intangible assets
Gross Amount	$ 13,860	$ 10,351
Accumulated Amortization	(3,933)	(3,069)
Net	9,927	7,282
Indefinite-life intangible assets	1,227	1,227
Intangible assets, Gross Carrying Amount	15,087	11,578
Intangible assets, Accumulated Amortization	(3,933)	(3,069)
Total intangible assets, net	11,154	8,509
Customer relationships [Member]
Finite-life intangible assets
Gross Amount	9,723	6,913
Accumulated Amortization	(1,697)	(1,292)
Net	8,026	5,621
Trademarks [Member]
Finite-life intangible assets
Gross Amount	2,034	1,335
Accumulated Amortization	(667)	(421)
Net	1,367	914
Trade secrets [Member]
Finite-life intangible assets
Gross Amount	962	962
Accumulated Amortization	(896)	(768)
Net	66	194
Carrier relationships [Member]
Finite-life intangible assets
Gross Amount	800	800
Accumulated Amortization	(337)	(257)
Net	463	543
Other finite-life intangible assets [Member]
Finite-life intangible assets
Gross Amount	341	341
Accumulated Amortization	(336)	(331)
Net	$ 5	$ 10

Goodwill and Intangible Assets-Future Amortization (Details) (USD $) In Thousands, unless otherwise specified	Mar. 29, 2015
Estimated amortization expense [Abstract]
2015	$ 932
2016	885
2017	873
2018	791
2019	$ 690

Share Based Compensation-Restricted and Performance Shares Rollforward (Details) (USD $)	12 Months Ended
	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Performance-Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning Balance, Shares	52,104
Granted, Shares	24,932
Vested, Shares	(23,300)
Forfeited or expired, Shares	(156)
Ending Balance, Shares	53,580	52,104
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Beginning Balance, Weighted average grant date fair value (usd per share)	$ 36.99
Granted, Weighted average grant date fair value (usd per share)	$ 34.45	$ 40.25	$ 33.01
Vested, Weighted average grant date fair value (usd per share)	$ 33.01
Forfeited or expired, Weighted average grant date fair value (usd per share)	$ 33.01
Ending Balance, Weighted average grant date fair value (usd per share)	$ 37.55	$ 36.99
Restricted Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning Balance, Shares	6,055
Granted, Shares	7,077
Vested, Shares	(6,055)
Forfeited or expired, Shares	0
Ending Balance, Shares	7,077
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Beginning Balance, Weighted average grant date fair value (usd per share)	$ 40.42
Granted, Weighted average grant date fair value (usd per share)	$ 34.61
Vested, Weighted average grant date fair value (usd per share)	$ 40.42
Forfeited or expired, Weighted average grant date fair value (usd per share)	$ 0
Ending Balance, Weighted average grant date fair value (usd per share)	$ 34.61

Share Based Compensation-Textual (Details) (USD $)	12 Months Ended
Share Based Compensation-Textual (Details) (USD $)	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Tax benefit on share-based compensation plans	$ 92,000	$ (214,000)	$ 510,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Stock Options Exercised (shares)	9,333
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$ 19.90
Performance-Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of restricted stock to be issued minimum	0
Range of restricted stock to be issued maximum	50,874
Vesting period	2 years
Weighted average grant date fair value (usd per share)	$ 34.45	$ 40.25	$ 33.01
Compensation expense	1,100,000	800,000	1,100,000
Equity instruments other than options, vested in period, total fair value	800,000	1,300,000	0
Cost not yet recognized	1,000,000
Tax benefit on share-based compensation plans	100,000	(200,000)	500,000
Restricted Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value (usd per share)	$ 34.61
Compensation expense	200,000	200,000	200,000
Cost not yet recognized	$ 100,000
Weighted Average [Member] \| Performance-Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cost not yet recognized, period for recognition	1 year 1 month
Weighted Average [Member] \| Restricted Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cost not yet recognized, period for recognition	3 months 18 days

Profit Sharing, Employee Stock Ownership, Employee Stock Purchase and Pension Plans (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Defined Contribution Plan Disclosure [Line Items]
Deferred Compensation Plan, Subsequent Employees Hired Maximum Annual Profit Sharing Percentage Compared to Employees Hired Before Benchmark Date	50.00%
Subsequent employees hired maximm annual profit sharing percentage compared to employees hired before benchmark date (percent)	50.00%
Deferred Compensation, Maximum Annual Profit Sharing Per Employee, Percent	5.00%	5.00%	5.00%
Employee Stock Ownership Plan (ESOP), Compensation Expense, Maximum Percent of Eligible Compensation	5.00%	5.00%	5.00%
ESPP Shares Issued (shares)	31,383	28,214	30,434
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 1,266	$ 1,231	$ 1,204
Defined Contribution Plan, Employer Matching Contribution Amount	1,216	980	1,206
Employee Stock Ownership Plan (ESOP), Compensation Expense	1,266	1,231	1,203
Total contribution expense	4,451	4,199	3,902
Multiemployer Pension Plan Withdrawal Aggregate Cash Payment per Year	467
Maximum [Member] \| Pension Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Employer matching contribution (percent)	5.00%	5.00%	5.00%
Bargaining Unit Employee Plans [Member]
Defined Contribution Plan Disclosure [Line Items]
Defined Contribution Plan, Cost Recognized	450	500	0
Bargaining Unit Employee Plans [Member] \| Deferred Profit Sharing [Member]
Defined Contribution Plan Disclosure [Line Items]
Deferred Compensation, Maximum Annual Profit Sharing Per Employee, Percent	5.00%
Minimum annual profit sharing per employee (percent)	2.50%
Bargaining Unit Employee Plans [Member] \| Employee Stock Ownership Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Employee Stock Ownership Plan (ESOP), Compensation Expense, Maximum Percent of Eligible Compensation	5.00%
Minimum annual profit sharing per employee (percent)	2.50%
Employee Stock Purchase Plans [Member]
Defined Contribution Plan Disclosure [Line Items]
Employee Stock Purchase Plans (ESPP), Compensation Expense	$ 253	$ 257	$ 289

Profit Sharing, Employee Stock Ownership, Employee Stock Purchase and Pension Plans-Multiemployer Pension Plans (Details) (USD $)	12 Months Ended
	Mar. 30, 2014	Mar. 31, 2013	Mar. 29, 2015 collective_barganing_units
Compensation and Retirement Disclosure [Abstract]
Multiemployer plan, period contributions		$ 400,000
Multiemployer pension plan withdrawal aggregate cash payment per year			467,000
Multiemployer pension plan withdrawal post tax charge per share (usd per share)		$ 0.43
Multiemployer pension plan withdrawal post tax charge		4,500,000
Multiemployer pension plan withdrawal pre-tax charge		7,200,000
Number of Collective Bargaining Agreements			2
Multi Employer Pension Plan Withdrawal Liability Payment Over Period of Years	20 years
Multiemployer Pension Plan Withdrawal Aggregate Cash Payment	$ 9,300,000

Commitments and Contingencies-Future minimum operating lease payments (Details) (USD $) In Thousands, unless otherwise specified	Mar. 29, 2015
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2015	$ 2,139
2016	1,916
2017	1,740
2018	1,555
2019	1,388
Thereafter	$ 4,198

Commitments and Contingencies-Textual (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Jul. 01, 2012 ICL Performance Products LP (ICL) [Member]	Mar. 29, 2015 Land [Member] lease
Loss Contingencies [Line Items]
Legal settlement	$ 3.2
Settlement loss net of tax	$ 2.0
Settelment loss, net of tax, per diluted share (usd per share)	$ 0.19
Number of leases		3

Income Taxes-Provision of Income Tax (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Income Tax Examination [Line Items]
Federal — current	$ 9,574	$ 7,612	$ 8,967
State — current	2,133	1,255	2,417
Total current	11,707	8,867	11,384
Federal — deferred	(517)	676	(2,466)
State — deferred	50	424	(600)
Total deferred	(467)	1,100	(3,066)
Total provision	11,240	9,967	8,318
State and Local Jurisdiction [Member]
Income Tax Examination [Line Items]
Decrease resulting from current period tax positions		400
U.S. Federal tax return [Member]
Income Tax Examination [Line Items]
Amended Federal tax return, increase in benefits			$ 800

Income Taxes-Effective Income Tax Rate Reconciliation (Details)	12 Months Ended
	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Income Tax Disclosure [Abstract]
Statutory federal income tax (percent)	35.00%	35.00%	35.00%
State income taxes, net of federal deduction (percent)	4.70%	3.20%	4.90%
ESOP dividend deduction on allocated shares (percent)	(0.70%)	(0.80%)	(1.00%)
Domestic production deduction (percent)	(2.40%)	(2.10%)	(2.70%)
Impact of amended tax returns (percent)	0.00%	0.00%	(3.30%)
Other — net (percent)	0.30%	0.20%	(0.20%)
Total (percent)	36.90%	35.50%	32.70%

Income Taxes Income Taxes-Deferred Tax Assets (Details) (USD $) In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014
Deferred tax assets:
Trade receivables	$ 178	$ 191
Stock compensation accruals	949	1,031
Pension withdrawal liability	2,755	2,872
Other	811	842
Total deferred tax assets	4,693	4,936
Deferred tax liabilities:
Inventories	(3,307)	(3,618)
Prepaid	(689)	(727)
Excess of tax over book depreciation	(12,699)	(13,221)
Amortization of intangibles	(674)	(456)
Total deferred tax liabilities	(17,369)	(18,022)
Net deferred tax liabilities	$ (12,676)	$ (13,086)

Segment Information (Details) (USD $)
In Thousands, unless otherwise specified

3 Months Ended

12 Months Ended

Mar. 29, 2015

Dec. 28, 2014

Sep. 28, 2014

Jun. 29, 2014

Mar. 30, 2014

Dec. 29, 2013

Sep. 29, 2013

Jun. 30, 2013

Mar. 29, 2015

Mar. 30, 2014

Mar. 31, 2013

Summary of Segment Information

Sales

$ 93,281

$ 83,825

$ 88,881

$ 98,036

$ 85,223

$ 81,697

$ 86,599

$ 94,744

$ 364,023

$ 348,263

$ 350,387

Gross profit

15,531

13,642

18,122

18,496

14,249

13,550

16,570

17,231

65,791

61,600

56,936

Selling, general, and administrative expenses

9,532

8,697

8,271

8,875

8,080

8,167

8,293

8,970

35,375

33,510

31,606

Operating income

5,999

4,945

9,851

9,621

6,169

5,383

8,277

8,261

30,416

28,090

25,330

Identifiable assets

194,017

170,507

^[1]

194,017

170,507

^[1]

169,275

^[1]

Unallocated Amount to Segment [Member]

Summary of Segment Information

Identifiable assets

53,700

66,700

53,700

66,700

52,900

Industrial [Member]

Summary of Segment Information

Sales

249,066

244,888

248,556

Gross profit

33,619

32,041

28,878

Selling, general, and administrative expenses

19,793

19,781

19,923

Operating income

13,826

12,260

8,955

Identifiable assets

151,157

141,506

^[1]

151,157

141,506

^[1]

143,827

^[1]

Water Treatment [Member]

Summary of Segment Information

Sales

114,957

103,375

101,831

Gross profit

32,172

29,559

28,058

Selling, general, and administrative expenses

15,582

13,729

11,683

Operating income

16,590

15,830

16,375

Identifiable assets

$ 42,860

$ 29,001

^[1]

$ 42,860

$ 29,001

^[1]

$ 25,448

^[1]

[1]	Unallocated assets, consisting primarily of cash and cash equivalents, investments and prepaid expenses, were $53.7 million at March 29, 2015, $66.7 million at March 30, 2014 and $52.9 million at March 31, 2013.

Segment Information-Textual (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended		3 Months Ended
	Mar. 29, 2015 Customer Segment	Mar. 31, 2013	Jul. 01, 2012 ICL Performance Products LP (ICL) [Member]
Segment Reporting Information [Line Items]
Number of reportable segments (segment)	2
Multiemployer pension plan withdrawal charge		$ 7.2
Legal settlement			$ 3.2
Number of customers representing 10% or more of revenue (customers)	0

Selected Quarterly Financial Data (Unaudited) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Mar. 29, 2015	Dec. 28, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 29, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Segment Reporting Information [Line Items]
Sales	$ 93,281	$ 83,825	$ 88,881	$ 98,036	$ 85,223	$ 81,697	$ 86,599	$ 94,744	$ 364,023	$ 348,263	$ 350,387
Gross profit	15,531	13,642	18,122	18,496	14,249	13,550	16,570	17,231	65,791	61,600	56,936
Selling, general, and administrative expenses	9,532	8,697	8,271	8,875	8,080	8,167	8,293	8,970	35,375	33,510	31,606
Operating income	5,999	4,945	9,851	9,621	6,169	5,383	8,277	8,261	30,416	28,090	25,330
Net income	$ 3,900	$ 3,146	$ 6,147	$ 6,021	$ 4,295	$ 3,480	$ 5,207	$ 5,112	$ 19,214	$ 18,094	$ 17,126
Basic earnings per share (usd per share)	$ 0.37	$ 0.30	$ 0.58	$ 0.57	$ 0.41	$ 0.33	$ 0.49	$ 0.49	$ 1.82	$ 1.72	$ 1.64
Diluted earnings per share (usd per share)	$ 0.37	$ 0.30	$ 0.58	$ 0.57	$ 0.40	$ 0.33	$ 0.49	$ 0.48	$ 1.81	$ 1.71	$ 1.62

Share Repurchase Program (Notes)	12 Months Ended
Share Repurchase Program (Notes)	Mar. 29, 2015
Share Repurchase Program [Abstract]
Stockholders' Equity Note Disclosure [Text Block]	Share Repurchase Program On May 29, 2014, our Board authorized a share repurchase program of up to 300,000 shares of our outstanding common shares. Under the program, we are authorized to repurchase shares for cash on the open market or in privately negotiated transactions subject to applicable securities laws and regulations. Upon repurchase of the shares, we reduce our common stock for the par value of the shares with the excess applied against additional paid-in capital. During fiscal 2015 we repurchased 59,602 shares of common stock with an aggregate purchase price of $2.2 million.

Discontinued Operations	12 Months Ended
Discontinued Operations	Mar. 29, 2015
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	Discontinued Operations During the fiscal year ended March 29, 2009, we agreed to sell our inventory and entered into a marketing agreement regarding the business of our Pharmaceutical segment, which provided pharmaceutical chemicals to retail pharmacies and small-scale pharmaceutical manufacturers. We have no remaining obligations to fulfill under the agreement. The results of the Pharmaceutical segment have been reported as discontinued operations for all periods presented.

Inventories (Details) (USD $) In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014
Summary of Inventories
Inventory (FIFO basis)	$ 42,567	$ 31,344
LIFO reserve	(5,539)	(5,152)
Net inventory	$ 37,028	$ 26,192

Inventories-Textual (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Mar. 29, 2015	Mar. 30, 2014
Inventories (Textual) [Abstract]
Finished goods (LIFO basis)	$ 39.0	$ 28.5
Increase (Decrease) LIFO reserve	$ 0.4	$ (1.9)

Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014
Unrealized gain (loss) on:
Available-for-sale investments	$ (25)	$ (36)
Post-retirement plan liability adjustments	(7)	(8)
Accumulated other comprehensive loss	$ (32)	$ (44)

Goodwill and Intangible Assets-Goodwill Rollforward (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 29, 2015	Mar. 30, 2014
Goodwill [Roll Forward]
Goodwill, beginning of period	$ 7,392	$ 6,495
Period increase (decrease)	4,358	897
Goodwill, end of period	$ 11,750	$ 7,392

Share Repurchase Program (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Mar. 29, 2015
Share Repurchase Program [Abstract]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased	300,000
Stock Repurchased During Period, Shares	59,602
Stock Repurchased During Period, Value	$ 2.2