Document and Entity Information [Abstract] Statement, Equity Components [Axis] Equity Component [Domain] ASSETS Assets [Abstract] CURRENT ASSETS: Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Investments available-for-sale Marketable Securities Trade receivables - less allowance for doubtful accounts: $460 for 2012 and $406 for 2011 Accounts Receivable, Net, Current Allowance for doubtful accounts, trade receivables Allowance for Doubtful Accounts Receivable, Current Inventories Inventory, Net Income taxes receivable Income Taxes Receivable, Current Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current, Total Total current assets 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 Total property, plant, and equipment Property, Plant and Equipment, Gross Total property, plant, and equipment Less accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Net property, plant, and equipment Property, Plant and Equipment, Net Net property, plant, and equipment OTHER ASSETS: Other Assets, Noncurrent [Abstract] Goodwill Goodwill Intangible assets - less accumulated amortization: $1,790 for 2012 and $1,165 for 2011 Intangible Assets, Net (Excluding Goodwill) Accumulated amortization on intangible assets Finite-Lived Intangible Assets, Accumulated Amortization Long-term investments Long-term Investments Other Other Assets, Noncurrent Total other assets Other Assets, Total Total other assets Total assets Assets, Total Total 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, Current Container deposits Customer Deposits, Current Other accruals Other Accrued Liabilities, Current Total current liabilities Liabilities, Current, Total Total current liabilities OTHER LONG-TERM LIABILITIES Other Liabilities, Noncurrent DEFERRED INCOME TAXES Deferred Tax Liabilities, Noncurrent Total liabilities Liabilities, Total Total 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; 10,430,874 and 10,307,177 shares issued and outstanding for 2012 and 2011, respectively Common Stock, Value, Issued Common stock, shares authorized Common Stock, Shares Authorized Common stock, par value Common Stock, Par or Stated Value Per Share Common stock, shares issued Common Stock, Shares, Issued Common stock, shares outstanding Common Stock, Shares, Outstanding Additional paid-in capital Additional Paid in Capital, Common Stock Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Total shareholders' equity Stockholders' Equity Attributable to Parent, Total Total shareholders' equity Total shareholders' equity Liabilities and Equity Total liabilities and shareholders' equity Sales Revenue, Net Cost of sales Cost of Goods and Services Sold Cost of sales Gross profit Gross Profit Gross profit Selling, general and administrative expenses Selling, General and Administrative Expense Selling, general and administrative expenses Operating income Operating Income (Loss) Operating income Investment income Investment Income, Interest Income from continuing operations before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Income from continuing operations before income taxes Provision for income taxes Income Tax Expense (Benefit) Provision for income taxes Income from continuing operations Income (Loss) from Continuing Operations Attributable to Parent Income from continuing operations Income from discontinued operations, net of tax Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent Net income Net Income (Loss) Attributable to Parent Net income Weighted average number of shares outstanding-basic Weighted Average Number of Shares Outstanding, Basic Weighted average number of shares outstanding-diluted 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, 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, 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 Statement [Table] Statement [Line Items] Common Stock BALANCE - March 29, 2009, shares Shares, Issued Beginning balance, shares Beginning balance Additional Paid-in Capital Retained Earnings Accumulated Other Comprehensive Income (Loss) Dividends, Common Stock, Cash Cash dividends Cash dividends Stock compensation expense Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Stock Issued During Period Shares Restricted Stock Vested Vesting of restricted stock, shares Vesting of restricted stock, shares Stock Issued During Period Value Restricted Stock Vested Vesting of restricted stock Vesting of restricted stock Comprehensive income: Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Unrealized gain (loss) on available-for-sale investments, net of tax Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Unrealized gain (loss) on post-retirement plan liability, net of tax Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized (Gain) Loss Arising During Period, Net of Tax Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income Ending balance, shares Ending balance Tax benefit on share-based compensation plans Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Shares Surrendered During Period for Payroll Taxes Shares surrendered for payroll taxes, shares Shares surrendered for payroll taxes, shares Shares surrendered for payroll taxes, shares Shares Surrendered During Period for Payroll Taxes Value Shares surrendered for payroll taxes Shares surrendered for payroll taxes Shares surrendered for payroll taxes Stock Options Exercised, shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period 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 CASH FLOWS FROM OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities [Abstract] 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) Stock compensation expense Share-based Compensation Loss from property disposals Gain (Loss) on Disposition of Property Loss from property disposals 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 Trade receivables Inventories Increase (Decrease) in Inventories 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 Other Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Net cash provided by 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 Additions to property, plant, and equipment Purchases of investments Payments to Acquire Investments Purchases of 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 Acquisition of Vertex Payments to Acquire Businesses, Net of Cash Acquired Acquisition of Vertex Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities CASH FLOWS FROM FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities [Abstract] Cash dividends paid Payments of Dividends, Common Stock Cash dividends paid New Shares Issued Stock Issued New Shares Issued 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 Surrendured for Payroll Taxes Shares surrendured for payroll taxes Shares surrendured for payroll taxes Shares surrendured for payroll taxes Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Net cash used in financing activities NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS Cash and Cash Equivalents, Period Increase (Decrease) NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS CASH AND CASH EQUIVALENTS- Cash and Cash Equivalents [Abstract] Beginning of period 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 Noncash investing activities- Other Noncash Investing and Financing Items [Abstract] Acquisition Purchase Price in Accounts Payable Acquisition purchase price in accounts payable Acquisition purchase price in accounts payable Capital expenditures in accounts payable Capital Expenditures Incurred but Not yet Paid Nature of Business and Significant Accounting Policies Significant Accounting Policies [Text Block] Nature of Business and Significant Accounting Policies [Abstract] Nature of Business and Significant Accounting Policies [Abstract] Business Combinations Business Combination Disclosure [Text Block] Business Combinations [Abstract] Business Combinations [Abstract] Cash and Cash Equivalents and Investments Cash and Cash Equivalents Disclosure [Text Block] Inventories Inventory Disclosure [Text Block] Inventories [Abstract] Inventories [Abstract] Goodwill and Other Identifiable Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Goodwill and Other Identifiable Intangible Assets [Abstract] Goodwill and Other Identifiable Intangible Assets [Abstract] Accumulated Other Comprehensive Income (Loss) Comprehensive Income (Loss) Note [Text Block] Accumulated Other Comprehensive Income (Loss) [Abstract] Accumulated Other Comprehensive Income (Loss) [Abstract] Share-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Share-Based Compensation [Abstract] Share-Based Compensation [Abstract] Profit Sharing, Employee Stock Ownership, Employee Stock Purchase and Pension Plans Pension and Other Postretirement Benefits Disclosure [Text Block] Profit Sharing, Employee Stock Ownership, Employee Stock Purchase and Pension Plans [Abstract] Profit Sharing, Employee Stock Ownership, Employee Stock Purchase and Pension Plans [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies [Abstract] Commitments and Contingencies [Abstract] Income Taxes Income Tax Disclosure [Text Block] Income Taxes [Abstract] Income Taxes [Abstract] Discontinued Operations Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Discontinued Operations [Abstract] Discontinued Operations [Abstract] Segment Information Segment Reporting Disclosure [Text Block] Segment Information [Abstract] Segment Information [Abstract] Selected Quarterly Financial Data (Unaudited) Quarterly Financial Information [Text Block] Selected Quarterly Financial Data [Abstract] Selected Quarterly Financial Data (Unaudited) [Abstract] VALUATION AND QUALIFYING ACCOUNTS Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Valuation and Qualifying Accounts [Abstract] VALUATION AND QUALIFYING ACCOUNTS [Abstract] Amendment Flag Current Fiscal Year End Date Document Period End Date Document Type Entity Central Index Key Entity Common Stock, Shares Outstanding Entity Current Reporting Status Entity Filer Category Entity Registrant Name Entity Voluntary Filers Entity Well-known Seasoned Issuer Entity Public Float Document Fiscal Period Focus Document Fiscal Year Focus Consolidated Balance Sheets [Abstract] Consolidated Statements of Income [Abstract] Consolidated Statements of Shareholders' Equity and Comprehensive Income (Loss) [Abstract] Consolidated Statements of Cash Flows [Abstract]