Inventory Disclosure [Abstract]
Inventories (Textual) [Abstract]
Inventories (Textual) [Abstract]
Inventories.
Finished goods (LIFO basis)
LIFO Inventory Amount
Increase (Decrease) LIFO reserve
Inventory, LIFO Reserve, Period Charge
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding Shares, Exercised
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
Weighted-Average Exercise Price
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Outstanding Weighted-Average Exercise Price, Forfeited or expired (usd per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price
Aggregate Intrinsic Value
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Compensation and Retirement Disclosure [Abstract]
Schedule of contribution expenses
Schedule of Costs of Retirement Plans [Table Text Block]
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
Litigation Case [Axis]
Litigation Case [Axis]
Litigation Case [Domain]
Litigation Case [Domain]
ICL Performance Products LP (ICL) [Member]
ICL Performance Products LP (ICL) [Member]
ICL Performance Products LP (ICL) [Member]
Business Segments [Axis]
Segments [Axis]
Segment [Domain]
Segments [Domain]
Industrial [Member]
Industrial [Member]
Industrial.
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Number of reportable segments (segment)
Number of Reportable Segments
Multiemployer pension plan withdrawal charge
Multiemployer Pension Plan Withdrawal Pre Tax Charge
Multiemployer pension plan withdrawal pre-tax charge.
Legal settlement
Loss Contingency, Loss in Period
Number of customers representing 10% or more of revenue (customers)
Entity Wide Revenue Major Customer Number of Customers
Entity wide revenue major customer number of customers.
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Award Type [Axis]
Award Type [Axis]
Award Type [Domain]
Equity Award [Domain]
Performance-Based Restricted Stock [Member]
Performance Shares [Member]
Restricted Stock Awards [Member]
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Summary of performance-based restricted stock units
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]
Summary of restricted stock awards
Schedule of Share-based Compensation, Nonemployee Director Stock Award Plan, Activity [Table Text Block]
Multiemployer plan, period contributions
Multiemployer Plan, Period Contributions
Multiemployer pension plan withdrawal aggregate cash payment per year
Multiemployer Pension Plan Withdrawal Aggregate Cash Payment per Year
Multiemployer pension plan withdrawal aggregate cash payment per year.
Multiemployer pension plan withdrawal post tax charge per share (usd per share)
Multiemployer Pension Plan Withdrawal Post Tax Charge per Share
Multiemployer pension plan withdrawal post tax charge per share.
Multiemployer pension plan withdrawal post tax charge
Multiemployer Pension Plan Withdrawal Post Tax Charge
Multiemployer pension plan withdrawal post tax charge.
Multiemployer pension plan withdrawal pre-tax charge
Number of Collective Bargaining Agreements
Number of Collective Bargaining Agreements
Number of collective bargaining agreements.
Multi Employer Pension Plan Withdrawal Liability Payment Over Period of Years
Multi Employer Pension Plan Withdrawal Liability Payment Over Period of Years
Multi employer pension plan withdrawal liability payment over period of years.
Multiemployer Pension Plan Withdrawal Aggregate Cash Payment
Multiemployer Pension Plan Withdrawal Aggregate Cash Payment
Multiemployer pension plan withdrawal aggregate cash payment.
Income Tax Disclosure [Abstract]
Schedule of provisions for income taxes
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Schedule of effective income tax rate reconciliation
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Schedule of deferred tax assets and liabilities
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Share Repurchase Program [Abstract]
Share Repurchase Program [Abstract]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased
Stock Repurchase Program, Number of Shares Authorized to be Repurchased
Stock Repurchased During Period, Shares
Stock Repurchased During Period, Shares
Stock Repurchased During Period, Value
Stock Repurchased During Period, Value
Statement of Financial Position [Abstract]
Allowance for doubtful accounts receivable
Allowance for Doubtful Accounts Receivable
Intangible assets, accumulated amortization
Finite-Lived Intangible Assets, Accumulated Amortization
Common stock, shares authorized (shares)
Common Stock, Shares Authorized
Common stock, par value (usd per share)
Common Stock, Par or Stated Value Per Share
Common stock, shares issued (shares)
Common Stock, Shares, Issued
Common stock, shares outstanding (shares)
Common Stock, Shares, Outstanding
Summary of Segment Information
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Statement of Cash Flows [Abstract]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net income
Net Income (Loss) Attributable to Parent
Reconciliation to cash flows:
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Depreciation and amortization
Depreciation, Depletion and Amortization
Deferred income taxes
Deferred Income Tax Expense (Benefit)
Pension withdrawal
Multiemployer Pension Plan Withdrawal
Multiemployer pension plan withdrawal.
Share-based compensation expense
Share-based Compensation
Loss from property disposals
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property
Changes in operating accounts (using) providing cash, net of effects of acquisition:
Increase (Decrease) in Operating Capital [Abstract]
Trade receivables
Increase (Decrease) in Accounts Receivable
Inventories
Increase (Decrease) in Inventories
Accounts payable
Increase (Decrease) in Accounts Payable
Accrued liabilities
Increase (Decrease) in Accrued Liabilities
Income taxes
Increase (Decrease) in Income Taxes Payable
Other
Increase (Decrease) in Other Operating Assets and Liabilities, Net
Net cash provided by operating activities
Net Cash Provided by (Used in) Operating Activities
CASH FLOWS FROM INVESTING ACTIVITIES:
Net Cash Provided by (Used in) Investing Activities [Abstract]
Additions to property, plant, and equipment
Payments to Acquire Property, Plant, and Equipment
Purchases of investments
Payments to Acquire Investments
Sale and maturities of investments
Proceeds from Sale and Maturity of Marketable Securities
Proceeds from property disposals
Proceeds from Sale of Property, Plant, and Equipment
Acquisitions
Payments to Acquire Businesses, Net of Cash Acquired
Net cash used in investing activities
Net Cash Provided by (Used in) Investing Activities
CASH FLOWS FROM FINANCING ACTIVITIES:
Net Cash Provided by (Used in) Financing Activities [Abstract]
Cash dividends paid
Payments of Ordinary Dividends, Common Stock
New shares issued
Proceeds from Issuance of Common Stock
Stock options exercised
Proceeds from Stock Options Exercised
Excess tax benefit from share-based compensation
Excess Tax Benefit from Share-based Compensation, Financing Activities
Shares surrendered for payroll taxes
Shares Surrendured for Payroll Taxes
Shares surrendured for payroll taxes
Shares repurchased
Payments for Repurchase of Equity
Net cash used in financing activities
Net Cash Provided by (Used in) Financing Activities
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS
Cash and Cash Equivalents, Period Increase (Decrease)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD
Cash and Cash Equivalents, at Carrying Value
CASH AND CASH EQUIVALENTS, END OF PERIOD
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION-
Supplemental Cash Flow Information [Abstract]
Cash paid during the year for income taxes
Income Taxes Paid, Net
Capital expenditures in accounts payable
Capital Expenditures Incurred but Not yet Paid
Inventories
Inventory Disclosure [Text Block]
Accounting Policies [Abstract]
Nature of Business and Significant Accounting Policies
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]
Valuation and Qualifying Accounts [Abstract]
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible assets amortization expense
Amortization of Intangible Assets
Statement of Stockholders' Equity [Abstract]
Statement [Table]
Statement [Table]
Equity Components [Axis]
Equity Components [Axis]
Equity Component [Domain]
Equity Component [Domain]
Common Stock [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
AOCI Attributable to Parent [Member]
Statement [Line Items]
Statement [Line Items]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares outstanding, beginning balance
Shares, Issued
Stockholders' equity, beginning balance
Stockholders' Equity Attributable to Parent
Cash dividends
Dividends, Common Stock, Cash
Stock compensation expense
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition
Tax benefit on share-based compensation plans
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation
Vesting of restricted stock (shares)
Stock Issued During Period, Shares, Restricted Stock Award, Gross
Vesting of restricted stock
Stock Issued During Period, Value, Restricted Stock Award, Gross
Shares surrendered for payroll taxes (shares)
Shares Surrendered During Period, For Payroll Taxes, Shares
Shares Surrendered During Period, For Payroll Taxes, Shares
Shares surrendered for payroll taxes
Shares Surrendered During Period, For Payroll Taxes, Value
Shares Surrendered During Period, For Payroll Taxes, Value
Stock Options Exercised (shares)
Stock options exercised
Stock Issued During Period, Value, Stock Options Exercised
ESPP Shares Issued (shares)
Stock Issued During Period, Shares, Employee Stock Purchase Plans
ESPP shares issued
Stock Issued During Period, Value, Employee Stock Purchase Plan
Total other comprehensive income
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Shares Repurchased (Shares)
Net income
Shares outstanding, ending balance
Stockholders' equity, ending balance
Schedule of Property, Plant and Equipment [Table]
Property, Plant and Equipment [Table]
Property, Plant and Equipment, Type [Axis]
Property, Plant and Equipment, Type [Axis]
Property, Plant and Equipment, Type [Domain]
Property, Plant and Equipment, Type [Domain]
Building and Building Improvements [Member]
Building and Building Improvements [Member]
Machinery and Equipment [Member]
Machinery and Equipment [Member]
Transportation Equipment [Member]
Transportation Equipment [Member]
Office Furniture, Office Equipment and Computer Systems [Member]
Office Furniture, Office Equipment and Computer Systems [Member]
Office Furniture, Office Equipment and Computer Systems [Member]
Range [Axis]
Range [Axis]
Range [Domain]
Range [Domain]
Maximum [Member]
Maximum [Member]
Minimum [Member]
Minimum [Member]
Average [Member]
Weighted Average [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment [Line Items]
Number of days in fiscal year
Number of Weeks in Fiscal Year
Number of Weeks in Fiscal Year
Number of days in next fiscal year
Number of Weeks in Next Fiscal Year
Number of Weeks in Next Fiscal Year
Percentage of FIFO inventory (percent)
Percentage of FIFO Inventory
Property, plant and equipment, estimated useful lives
Property, Plant and Equipment, Useful Life
Finite-lived intangible asset, useful life
Finite-Lived Intangible Asset, Useful Life
Weighted-average common shares outstanding-basic (shares)
Weighted Average Number of Shares Outstanding, Basic
Dilutive impact of stock options, performance units, and restricted stock (shares)
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements
Weighted average common shares outstanding — diluted (shares)
Weighted Average Number of Shares Outstanding, Diluted
Weighted average number diluted shares outstanding adjustment
Weighted Average Number Diluted Shares Outstanding Adjustment
Schedule of goodwill
Schedule of Goodwill [Table Text Block]
Summary of intangible assets
Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block]
Schedule of future amortization expense
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
Share-Based Compensation
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]
Weighted Average [Member]
Stock Options [Member]
Employee Stock Option [Member]
Range of restricted stock to be issued minimum
Range of Restricted Stock to be Issued Minimum
Range of restricted stock to be issued minimum.
Range of restricted stock to be issued maximum
Range of Restricted Stock to be Issued Maximum
Range of restricted stock to be issued maximum.
Vesting period
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period
Weighted average grant date fair value (usd per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value
Compensation expense
Allocated Share-based Compensation Expense
Equity instruments other than options, vested in period, total fair value
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value
Cost not yet recognized
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized
Cost not yet recognized, period for recognition
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price
Segment Information
Segment Reporting Disclosure [Text Block]
Commitments and Contingencies Disclosure [Abstract]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2015
Operating Leases, Future Minimum Payments Due, Next Twelve Months
2016
Operating Leases, Future Minimum Payments, Due in Two Years
2017
Operating Leases, Future Minimum Payments, Due in Three Years
2018
Operating Leases, Future Minimum Payments, Due in Four Years
2019
Operating Leases, Future Minimum Payments, Due in Five Years
Thereafter
Operating Leases, Future Minimum Payments, Due Thereafter
Cash and Cash Equivalents [Abstract]
Schedule of Cash and Cash Equivalents [Table]
Schedule of Cash and Cash Equivalents [Table]
Fair Value, Hierarchy [Axis]
Fair Value, Hierarchy [Axis]
Fair Value, Measurements, Fair Value Hierarchy [Domain]
Fair Value Hierarchy [Domain]
Level 1 [Member]
Fair Value, Inputs, Level 1 [Member]
Level 2 [Member]
Fair Value, Inputs, Level 2 [Member]
Level 3 [Member]
Fair Value, Inputs, Level 3 [Member]
Cash and Cash Equivalents [Axis]
Cash and Cash Equivalents [Axis]
Cash and Cash Equivalents [Domain]
Cash and Cash Equivalents [Domain]
Cash [Member]
Cash [Member]
Certificates of deposit [Member]
Certificates of Deposit [Member]
Municipal Bonds [Member]
Municipal Bonds [Member]
Money market securities [Member]
Money Market Funds [Member]
Cash and Cash Equivalents [Line Items]
Cash and Cash Equivalents [Line Items]
Summary of financial assets and liabilities measured at fair value
Cash, Cash Equivalents, and Short-term Investments [Abstract]
Assets:
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Cash/Certificates of deposit/Money market securities
Cash and Cash Equivalents, Fair Value Disclosure
Unallocated Amount to Segment [Member]
Segment Reconciling Items [Member]
Industrial [Member]
Water Treatment [Member]
Water Treatment [Member]
Water treatment.
Summary of Segment Information
Segment Reporting Information, Additional Information [Abstract]
Sales
Revenue, Net
Gross profit
Gross Profit
Selling, general, and administrative expenses
Selling, General and Administrative Expense
Operating income
Operating Income (Loss)
Identifiable assets
Assets Not Allocated to a Reporting Segment
Assets Not Allocated to a Reporting Segment
Summary of financial assets and liabilities measured at fair value
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Available-for-sale securities
Investments Classified by Contractual Maturity Date [Table Text Block]
Cash and Cash Equivalents and Investments
Cash and Cash Equivalents Disclosure [Text Block]
Business Combinations [Abstract]
Business Combination Disclosure [Text Block]
Business Combination Disclosure [Text Block]
Minimum rentals
Operating Leases, Rent Expense, Minimum Rentals
Contingent rentals
Operating Leases, Rent Expense, Contingent Rentals
Total rental expense
Operating Leases, Rent Expense, Net
Summary of Inventories
Inventory, Net [Abstract]
Inventory (FIFO basis)
Inventory, Finished Goods, Gross
LIFO reserve
Inventory, LIFO Reserve
Net inventory
Inventory, Net
Income Tax Examination [Table]
Income Tax Examination [Table]
Income Tax Authority [Axis]
Income Tax Authority [Axis]
Income Tax Authority [Domain]
Income Tax Authority [Domain]
State and Local Jurisdiction [Member]
State and Local Jurisdiction [Member]
U.S. Federal tax return [Member]
Internal Revenue Service (IRS) [Member]
Income Tax Examination [Line Items]
Income Tax Examination [Line Items]
Federal — current
Current Federal Tax Expense (Benefit)
State — current
Current State and Local Tax Expense (Benefit)
Total current
Current Income Tax Expense (Benefit)
Federal — deferred
Deferred Federal Income Tax Expense (Benefit)
State — deferred
Deferred State and Local Income Tax Expense (Benefit)
Total deferred
Deferred Income Tax Expense (Benefit), Excluding Provisional Gain
Deferred Income Tax Expense (Benefit), Excluding Provisional Gain
Total provision
Income Tax Expense (Benefit)
Decrease resulting from current period tax positions
Unrecognized Tax Benefits, Decrease Resulting from Current Period Tax Positions
Amended Federal tax return, increase in benefits
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions
Income Statement [Abstract]
Scenario [Axis]
Scenario [Axis]
Scenario, Unspecified [Domain]
Scenario, Unspecified [Domain]
Cost of sales
Cost of Goods and Services Sold
Pension withdrawal
Multiemployer Pension Plan Withdrawal Charge
Expense related to withdrawal from a multiemployer pension plan.
Gross profit
Selling, general and administrative expenses
Operating income
Interest income (expense), net
Interest Income (Expense), Net
Income from continuing operations before income taxes
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest
Income tax provision
Income Tax Expense (Benefit), Continuing Operations, Total
The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to pretax income or loss from continuing operations.
Income from continuing operations
Income (Loss) from Continuing Operations Attributable to Parent
Income from discontinued operations, net of tax
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent
Net income
Weighted average number of shares outstanding-basic
Weighted average number of shares outstanding-diluted
Basic earnings per share:
Earnings Per Share, Basic [Abstract]
Earnings per share from continuing operations
Income (Loss) from Continuing Operations, Per Basic Share
Earnings per share from discontinued operations
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share
Basic earnings per share
Earnings Per Share, Basic
Diluted earnings per share
Earnings Per Share, Diluted [Abstract]
Earnings per share from continuing operations
Income (Loss) from Continuing Operations, Per Diluted Share
Earnings per share from discontinued operations
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share
Diluted earnings per share
Earnings Per Share, Diluted
Cash dividends declared per common share
Common Stock, Dividends, Per Share, Declared
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)
Comprehensive Income (Loss) Note [Text Block]
Document and Entity Information [Abstract]
Document and entity information.
Entity Registrant Name
Entity Registrant Name
Entity Central Index Key
Entity Central Index Key
Document Type
Document Type
Document Period End Date
Document Period End Date
Amendment Flag
Amendment Flag
Document Fiscal Year Focus
Document Fiscal Year Focus
Document Fiscal Period Focus
Document Fiscal Period Focus
Current Fiscal Year End Date
Current Fiscal Year End Date
Entity Well-known Seasoned Issuer
Entity Well-known Seasoned Issuer
Entity Voluntary Filers
Entity Voluntary Filers
Entity Current Reporting Status
Entity Current Reporting Status
Entity Filer Category
Entity Filer Category
Entity Public Float
Entity Public Float
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Fiscal Year
Fiscal Period, Policy [Policy Text Block]
Principles of Consolidation
Consolidation, Policy [Policy Text Block]
Estimates
Use of Estimates, Policy [Policy Text Block]
Revenue Recognition
Revenue Recognition, Policy [Policy Text Block]
Shipping and Handling
Shipping and Handling Cost, Policy [Policy Text Block]
Fair Value Measurements
Fair Value Measurement, Policy [Policy Text Block]
Cash Equivalents
Cash and Cash Equivalents, Policy [Policy Text Block]
Investments
Investment, Policy [Policy Text Block]
Trade Receivables
Trade and Other Accounts Receivable, Policy [Policy Text Block]
Inventories
Inventory, Policy [Policy Text Block]
Property, Plant and Equipment
Property, Plant and Equipment, Policy [Policy Text Block]
Goodwill and Identifiable Intangible Assets
Goodwill and Intangible Assets, Policy [Policy Text Block]
Income Taxes
Income Tax, Policy [Policy Text Block]
Stock-Based Compensation
Compensation Related Costs, Policy [Policy Text Block]
Earnings Per Share
Earnings Per Share, Policy [Policy Text Block]
Derivatives Instruments and Hedging Activities
Derivatives, Policy [Policy Text Block]
Estimated amortization expense [Abstract]
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2015
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months
2016
Finite-Lived Intangible Assets, Amortization Expense, Year Two
2017
Finite-Lived Intangible Assets, Amortization Expense, Year Three
2018
Finite-Lived Intangible Assets, Amortization Expense, Year Four
2019
Finite-Lived Intangible Assets, Amortization Expense, Year Five
Valuation Allowances and Reserves, Adjustments
Valuation Allowances and Reserves, Adjustments
Valuation Allowances and Reserves, Deductions
Valuation Allowances and Reserves, Deductions
Schedule of Finite-Lived Intangible Assets [Table]
Schedule of Finite-Lived Intangible Assets [Table]
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Customer relationships [Member]
Customer Relationships [Member]
Trademarks [Member]
Trademarks [Member]
Trade secrets [Member]
Trade Secrets [Member]
Carrier relationships [Member]
Carrier Relationships [Member]
Carrier relationships.
Other finite-life intangible assets [Member]
Other Finite Life Intangible Assets [Member]
Other finite-life intangible assets.
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets [Line Items]
Summary of intangible assets
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Finite-life intangible assets
Finite-Lived Intangible Assets, Net [Abstract]
Gross Amount
Finite-Lived Intangible Assets, Gross
Accumulated Amortization
Net
Finite-Lived Intangible Assets, Net
Indefinite-life intangible assets
Indefinite-Lived Intangible Assets (Excluding Goodwill)
Intangible assets, Gross Carrying Amount
Intangible Assets Gross Carrying Amount
Intangible assets gross carrying amount.
Intangible assets, Accumulated Amortization
Intangible Assets Accumulated Amortization
Intangible assets accumulated amortization.
Total intangible assets, net
Intangible Assets, Net (Excluding Goodwill)
Summary of Accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Unrealized gain (loss) on:
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Available-for-sale investments
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax
Post-retirement plan liability adjustments
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss), Net of Tax
Income Taxes
Income Tax Disclosure [Text Block]
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Data (Unaudited)
Quarterly Financial Information [Text Block]
Certificates of Deposit and Municipal Bonds [Member]
Certificates of Deposit and Municipal Bonds [Member]
Certificates of Deposit and Municipal Bonds [Member]
Cash and Cash Equivalents and Investments (Additional Textual) [Abstract]
Cash and Cash Equivalents and Investments (Additional Textual) [Abstract]
Cash and cash equivalents and investments.
Maturities period of certificates of deposit minimum
Maturities Period of Certificates of Deposit and Municipal Bonds, Minimum
Maturities Period of Certificates of Deposit and Municipal Bonds, Minimum
Maturities period of certificates of deposit maximum
Maturities Period of Certificates of Deposit and Municipal Bonds, Maximum
Maturities Period of Certificates of Deposit and Municipal Bonds, Maximum
Current asset fair value
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value
Noncurrent asset fair value
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value
Summary of Accumulated other comprehensive loss
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Stockholders' Equity Note Disclosure [Text Block]
Stockholders' Equity Note Disclosure [Text Block]
Loss Contingencies [Table]
Loss Contingencies [Table]
Land [Member]
Land [Member]
Loss Contingencies [Line Items]
Loss Contingencies [Line Items]
Settlement loss net of tax
Loss Contingency, Loss in Period, After Tax
Loss Contingency, Loss in Period, After Tax
Settelment loss, net of tax, per diluted share (usd per share)
Loss Contingency, Loss In Period, Net Of Tax, Per Diluted Share
Loss Contingency, Loss In Period, Net Of Tax, Per Diluted Share
Number of leases
Number of Leases
Number of Leases
Schedule of earnings per share, basic and diluted
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Schedule of future minimum rental payments for operating leases
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
Schedule of rent expense
Schedule of Rent Expense [Table Text Block]
Statement of Comprehensive Income [Abstract]
Unrealized gain (loss) on available-for-sale investments
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent
Unrealized gain on post-retirement liability
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax
Total comprehensive income
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Profit Sharing, Employee Stock Ownership Plan, Employee Stock Purchase Plan and Defined Contribution Pension Plan Contribution Expense
Pension and Other Postretirement Benefits Disclosure [Text Block]
Schedule of Business Acquisitions, by Acquisition [Table]
Schedule of Business Acquisitions, by Acquisition [Table]
Customer Relationships [Member]
Trade Names [Member]
Trade Names [Member]
Business Acquisition [Axis]
Business Acquisition [Axis]
Business Acquisition, Acquiree [Domain]
Business Acquisition, Acquiree [Domain]
The Dumont Company, Inc [Member]
The Dumont Company, Inc [Member]
The Dumont Company, Inc [Member]
Advance Chemical Solutions, Inc. [Member]
Advance Chemical Solutions, Inc. [Member]
Advance Chemical Solutions, Inc. [Member]
Business Acquisition [Line Items]
Business Acquisition [Line Items]
Accounts receivable
Accounts Receivable Acquired
Accounts Receivable Acquired
Inventory
Inventory Acquired
Inventory Acquired
Other assets
Other Assets Acquired
Other Assets Acquired
Property, plant, and equipment
Property, Plant, and Equipment Acquired
Property, Plant, and Equipment Acquired
Intangible assets
Finite-lived Intangible Assets Acquired
Current liabilities
Liabilities Assumed
Net assets acquired
Net Assets Acquired and Liabilities Assumed
Net Assets Acquired and Liabilities Assumed
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life
Goodwill
Goodwill, Acquired During Period
Total purchase price
Contingent consideration measurement period
Contingent Consideration Measurement Period
Contingent Consideration Measurement Period
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net
Revenue reported by acquired entity for last annual period
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period
Potential Earnout
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High
Schedule of quarterly financial information (Unaudited)
Schedule of Quarterly Financial Information [Table Text Block]
Commitments and Contingencies
Commitments and Contingencies Disclosure [Text Block]
Schedule of Available-for-sale Securities [Table]
Schedule of Available-for-sale Securities [Table]
Major Types of Debt and Equity Securities [Axis]
Major Types of Debt and Equity Securities [Axis]
Major Types of Debt and Equity Securities [Domain]
Major Types of Debt and Equity Securities [Domain]
Schedule of Available-for-sale Securities [Line Items]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Within one year
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis
Between one and three years
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis
Total available-for-sale securities
Available-for-sale Debt Securities, Amortized Cost Basis
Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Within one year
Between one and three years
Total available-for-sale securities
Available-for-sale Securities
Unrealized Gain (loss) [Abstract]
Available-for-sale Securities, Gross Unrealized Gain (Loss) [Abstract]
Total available-for-sale securities
Available-for-sale Securities, Gross Unrealized Gain (Loss), Total
Available-for-sale Securities, Gross Unrealized Gain (Loss), Total
Within one year
Available-for-sale Securities, Gross Unrealized Gain (Loss), Next Twelve Months
Available-for-sale Securities, Gross Unrealized Gain (Loss), Next Twelve Months
Between one and three years
Available-for-sale Securities, Gross Unrealized Gain (Loss), Year Two Through Five
Available-for-sale Securities, Gross Unrealized Gain (Loss), Year Two Through Five
Goodwill [Roll Forward]
Goodwill [Roll Forward]
Goodwill, beginning of period
Goodwill
Period increase (decrease)
Goodwill, Period Increase (Decrease)
Goodwill, end of period
Defined Contribution Plan [Table]
Defined Contribution Plan [Table]
Defined Benefit Plans and Other Postretirement Benefit Plans [Axis]
Defined Benefit Plans and Other Postretirement Benefit Plans [Axis]
Defined Benefit Plan and Other Postretirement Benefit Plan [Domain]
Defined Benefit Plan and Other Postretirement Benefit Plan [Domain]
Pension Plan [Member]
Pension Plan [Member]
Collective Bargaining Arrangement [Axis]
Collective Bargaining Arrangement [Axis]
Collective Bargaining Arrangement [Domain]
Collective Bargaining Arrangement [Domain]
Bargaining Unit Employee Plans [Member]
Bargaining Unit Employee Plans [Member]
Bargaining Unit Employee Plans [Member]
Employee Stock Purchase Plans [Member]
Employee Stock Purchase Plans [Member]
Employee Stock Purchase Plans [Member]
Defined Contribution Plan Type [Axis]
Defined Contribution Plan Type [Axis]
Defined Contribution Plan Type [Domain]
Defined Contribution Plan Type [Domain]
Deferred Profit Sharing [Member]
Deferred Profit Sharing [Member]
Employee Stock Ownership Plan [Member]
Employee Stock Ownership Plan [Member]
Employee Stock Ownership Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Defined Contribution Plan Disclosure [Line Items]
Deferred Compensation Plan, Subsequent Employees Hired Maximum Annual Profit Sharing Percentage Compared to Employees Hired Before Benchmark Date
Deferred Compensation Plan, Subsequent Employees Hired Maximum Annual Profit Sharing Percentage Compared to Employees Hired Before Benchmark Date
Deferred Compensation Plan, Subsequent Employees Hired Maximum Annual Profit Sharing Percentage Compared to Employees Hired Before Benchmark Date
Subsequent employees hired maximm annual profit sharing percentage compared to employees hired before benchmark date (percent)
Employee Stock Ownership Plan, ESOP, Subsequent Employees Hired Maximum Annual Profit Sharing Percentage Compared to Employees Hired Before Benchmark Date
Employee Stock Ownership Plan, ESOP, Subsequent Employees Hired Maximum Annual Profit Sharing Percentage Compared to Employees Hired Before Benchmark Date
Deferred Compensation, Maximum Annual Profit Sharing Per Employee, Percent
Deferred Compensation, Maximum Annual Profit Sharing Per Employee, Percent
Deferred Compensation, Maximum Annual Profit Sharing Per Employee, Percent
Employer matching contribution (percent)
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay
Employee Stock Ownership Plan (ESOP), Compensation Expense, Maximum Percent of Eligible Compensation
Employee Stock Ownership Plan (ESOP), Compensation Expense, Maximum Percent of Eligible Compensation
Employee Stock Ownership Plan (ESOP), Compensation Expense, Maximum Percent of Eligible Compensation
Minimum annual profit sharing per employee (percent)
Defined Contribution Plan, Minimum Annual Profit Sharing Per Employee Percent
Defined Contribution Plan, Minimum Annual Profit Sharing Per Employee Percent
Defined Contribution Plan, Employer Discretionary Contribution Amount
Defined Contribution Plan, Employer Discretionary Contribution Amount
Defined Contribution Plan, Employer Matching Contribution Amount
Defined Contribution Plan, Employer Matching Contribution Amount
Defined Contribution Plan, Employer Matching Contribution Amount
Employee Stock Ownership Plan (ESOP), Compensation Expense
Employee Stock Ownership Plan (ESOP), Compensation Expense
Defined Contribution Plan, Cost Recognized
Defined Contribution Plan, Cost Recognized
Employee Stock Purchase Plans (ESPP), Compensation Expense
Employee Stock Purchase Plans (ESPP), Compensation Expense
Employee Stock Purchase Plans (ESPP), Compensation Expense
Total contribution expense
Profit Sharing, Employee Stock Ownership Plan, Employee Stock Purchase Plan and Defined Contribution Pension Plan Contribution Expense
Profit Sharing, Employee Stock Ownership Plan, Employee Stock Purchase Plan and Defined Contribution Pension Plan Contribution Expense
Multiemployer Pension Plan Withdrawal Aggregate Cash Payment per Year
Statutory federal income tax (percent)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
State income taxes, net of federal deduction (percent)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent
ESOP dividend deduction on allocated shares (percent)
Effective Income Tax Rate Reconciliation, Deduction, Employee Stock Ownership Plan Dividend, Percent
Domestic production deduction (percent)
Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Percent
Impact of amended tax returns (percent)
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Percent
Other — net (percent)
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent
Total (percent)
Effective Income Tax Rate Reconciliation, Percent
Goodwill and Intangible Assets
Goodwill and Intangible Assets Disclosure [Text Block]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning Balance, Shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number
Granted, Shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
Vested, Shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period
Forfeited or expired, Shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period
Ending Balance, Shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Beginning Balance, Weighted average grant date fair value (usd per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Granted, Weighted average grant date fair value (usd per share)
Vested, Weighted average grant date fair value (usd per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value
Forfeited or expired, Weighted average grant date fair value (usd per share)
Ending Balance, Weighted average grant date fair value (usd per share)
Summary of Inventories
Schedule of Inventory, Current [Table Text Block]
ASSETS
Assets [Abstract]
CURRENT ASSETS:
Assets, Current [Abstract]
Cash and cash equivalents
Investments available-for-sale
Marketable Securities
Trade receivables, less allowance for doubtful accounts of $445 for 2015 and $477 for 2014
Accounts Receivable, Net, Current
Inventories
Income taxes receivable
Income Taxes Receivable, Current
Prepaid expenses and other current assets
Prepaid Expense and Other Assets, Current
Total current assets
Assets, Current
PROPERTY, PLANT, AND EQUIPMENT:
Property, Plant and Equipment [Abstract]
Land
Land
Buildings and improvements
Buildings and Improvements, Gross
Machinery and equipment
Machinery and Equipment, Gross
Transportation equipment
Transportation Equipment
Transportation equipment
Office furniture and equipment including computer systems
Furniture and Fixtures, Gross
Property, plant and equipment, gross
Property, Plant and Equipment, Gross
Less accumulated depreciation
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Net property, plant, and equipment
Property, Plant and Equipment, Net
OTHER ASSETS:
Other Assets [Abstract]
Goodwill
Intangible assets, less accumulated amortization of $3,933 for 2015 and $3,069 for 2014
Long-term investments
Long-term Investments
Other
Other Assets, Noncurrent
Total other assets
Other Assets
Total assets
Assets
LIABILITIES AND SHAREHOLDERS’ EQUITY
Liabilities and Equity [Abstract]
CURRENT LIABILITIES:
Liabilities, Current [Abstract]
Accounts payable — trade
Accounts Payable, Current
Dividends payable
Dividends Payable, Current
Accrued payroll and employee benefits
Employee-related Liabilities, Current
Deferred income taxes
Deferred Tax Liabilities, Net, Current
Income tax payable
Accrued Income Taxes, Current
Other current liabilities
Other Accrued Liabilities, Current
Total current liabilities
Liabilities, Current
PENSION WITHDRAWAL LIABILITY
Defined Benefit Pension Plan, Liabilities, Noncurrent
OTHER LONG-TERM LIABILITIES
Other Liabilities, Noncurrent
DEFERRED INCOME TAXES
Deferred Tax Liabilities, Net, Noncurrent
Total liabilities
Liabilities
COMMITMENTS AND CONTINGENCIES
Commitments and Contingencies
SHAREHOLDERS’ EQUITY:
Stockholders' Equity Attributable to Parent [Abstract]
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
Common Stock, Value, Issued
Additional paid-in capital
Additional Paid in Capital, Common Stock
Retained earnings
Retained Earnings (Accumulated Deficit)
Accumulated other comprehensive loss
Total shareholders’ equity
Total liabilities and shareholders’ equity
Liabilities and Equity
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]
Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]
Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]
Sales
Gross profit
Operating income
Basic earnings per share (usd per share)
Diluted earnings per share (usd per share)
Deferred tax assets:
Deferred Tax Assets, Gross [Abstract]
Trade receivables
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts
Stock compensation accruals
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost
Pension withdrawal liability
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions
Other
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Other
Total deferred tax assets
Deferred Tax Assets, Gross
Deferred tax liabilities:
Deferred Tax Liabilities, Gross [Abstract]
Inventories
Deferred Tax Liabilities, Inventory
Prepaid
Deferred Tax Liabilities, Prepaid Expenses
Excess of tax over book depreciation
Deferred Tax Liabilities, Property, Plant and Equipment
Amortization of intangibles
Deferred Tax Liabilities, Intangible Assets
Total deferred tax liabilities
Deferred Tax Liabilities, Gross
Net deferred tax liabilities
Deferred Tax Liabilities, Net