Unaudited Condensed Consolidated Balance Sheet Unaudited Condensed Consolidated Balance Sheet [Abstract] ASSETS ASSETS [Abstract] Current assets: Current assets: [Abstract] Cash and cash equivalents Receivables, net Inventories Deferred tax asset, net Prepaid expenses and other current assets Total current assets Other assets, net Energy swap asset, net of current portion Property, plant and equipment, net Goodwill and other intangible assets, net Total assets LIABILITIES AND STOCKHOLDERS’ EQUITY LIABILITIES AND STOCKHOLDERS’ EQUITY [Abstract] Current liabilities: Current liabilities: [Abstract] Current maturities of long-term debt Current portion of capital lease obligation Accounts payable Accrued liabilities Total current liabilities Long-term debt, net of current maturities Capital lease obligation, net of current portion Energy swap liability, net of current portion Deferred tax liability, net Pension liabilities, net Other long-term liabilities Total liabilities Commitments and contingencies Stockholders’ equity: Stockholders’ equity: [Abstract] Preferred stock, $0.01 par value; 10,000,000 authorized shares; none issued Common Stock, $0.01 par value; 80,000,000 authorized shares; 19,682,635 and 19,568,851 shares issued and outstanding at September 30, 2012 and December 31, 2011, respectively Capital in excess of par value Retained earnings Accumulated other comprehensive loss Total stockholders’ equity Total liabilities and stockholders’ equity Preferred stock par value (in Dollars per share) Preferred stock, shares authorized Preferred stock, shares issued Common Stock, par value (in Dollars per share) Common Stock, shares authorized Common Stock, shares issued Common Stock, shares outstanding Unaudited Condensed Consolidated Statement of Comprehensive Income Unaudited Condensed Consolidated Statement of Comprehensive Income [Abstract] Catastrophic Event [Domain] Revenues Cost of sales Gross profit Selling, general, and administrative expense Research and development expense Charges related to U.S. Attorney investigation Charges related to U.S. Attorney investigation Impairment of intangible assets Loss(Proceeds/Gains) from Catastrophe (Gain) loss on disposal of assets Operating income Interest income Interest expense Other expense, net Income before income taxes Provision for income taxes Net income Other comprehensive income (loss): Other comprehensive income (loss): [Abstract] Energy swap adjustment, net of tax expense (benefit) of $545, ($864), $383 and ($395), respectively Pension benefits adjustment, net of tax expense of $133, $105, $398 and $123, respectively Comprehensive income Basic earnings per share (in Dollars per share) Weighted average common shares outstanding (in Shares) Diluted earnings per share (in Dollars per share) Weighted average common shares and potential common share equivalents outstanding (in Shares) Energy swap adjustment, tax expense (benefit) Pension benefits adjustment, tax expense Unaudited Condensed Consolidated Statement of Cash Flows Unaudited Condensed Consolidated Statement of Cash Flows [Abstract] Business Acquisition, Acquiree [Domain] Cash flows from operating activities: Cash flows from operating activities: [Abstract] Net income Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to reconcile net income to net cash provided by operating activities: [Abstract] Depreciation and amortization Noncash losses (gains) from catastrophes. Other proceeds/gains resulting from natural disaster, net – 2005 storms (Gain) loss on disposal of assets Impairment of intangible assets Provisions for losses on receivables Stock-based compensation Deferred income taxes Changes in assets and liabilities: Changes in assets and liabilities: [Abstract] Receivables Inventories Prepaid expenses and other current assets Other assets Accounts payable Accrued liabilities Pension liability, net Other long term liabilities Net cash provided by operating activities Cash flows from investing activities: Cash flows from investing activities: [Abstract] Proceeds from disposition of assets Acquisitions Capital expenditures Net cash used in investing activities Cash flows from financing activities: Cash flows from financing activities: [Abstract] Principal payments of long-term debt Principal payments of capital lease obligation Debt issuance costs Proceeds from stock options exercised Excess tax benefit of stock options exercised Net cash (used in) provided by financing activities Net (decrease) increase in cash and cash equivalents Cash and cash equivalents at beginning of year Cash and cash equivalents at end of period Note 1 - Significant Accounting Policies Summary of Operations and Basis of Presentation Significant Accounting Policies [Text Block] Note 2 - Acquisition of Incon Processing, L.L.C. Mergers, Acquisitions and Dispositions Disclosures [Text Block] Note 3 - Gulf Of Mexico Oil Spill Extraordinary Items Disclosure [Text Block] Note 4 - Receivables, Net Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Note 5 - Inventories Inventory Disclosure [Text Block] Note 6 - Prepaid Expenses and Other Current Assets Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block] Note 7 - Other Assets Other Assets Disclosure [Text Block] Note 8 - Property, Plant, and Equipment Property, Plant and Equipment Disclosure [Text Block] Note 9 - Goodwill And Other Intangible Assets, Net Goodwill and Intangible Assets Disclosure [Text Block] Note 10 - Long-Term Debt Long-term Debt [Text Block] Note 11 - Capital Lease Obligation Debt and Capital Leases Disclosures [Text Block] Note 12 - Accrued Liabilities Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] Note 13 - Commitments And Contingencies Commitments and Contingencies Disclosure [Text Block] Note 14 - Related Party Transactions Related Party Transactions Disclosure [Text Block] Note 15 - Reconciliation of Basic and Diluted Per Share Data Earnings Per Share [Text Block] Note 16 - Components of Net Periodic Benefit Cost Pension and Other Postretirement Benefits Disclosure [Text Block] Note 17 - Fair Value Disclosures Fair Value Disclosures [Text Block] Note 18 - Income Taxes Income Tax Disclosure [Text Block] Significant Accounting Policies (Abstract) Significant Accounting Policies Consolidation, Policy [Policy Text Block] Inventory, Policy [Policy Text Block] Derivatives, Policy [Policy Text Block] Revenue Recognition, Percentage-of-Completion Method [Policy Text Block] New Accounting Pronouncements, Policy [Policy Text Block] Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Derivative, Name [Domain] Schedule of Derivative Instruments [Table Text Block] Schedule of Changes in Accumulated Other Comprehensive Loss, Net of Tax [Table Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Business Acquisition, Pro Forma Information [Table Text Block] Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Schedule of Inventory, Current [Table Text Block] Schedule of Other Current Assets [Table Text Block] Schedule of Other Assets [Table Text Block] Property, Plant and Equipment [Table Text Block] Table Of Intangible Assets Other Than Goodwill Schedule of Intangible Assets other than Goodwill [Table Text Block] Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Schedule of Debt [Table Text Block] Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block] Schedule of Capital Leased Assets [Table Text Block] Schedule of Accrued Liabilities [Table Text Block] Schedule of Earnings Per Share Reconciliation [Table Text Block] Schedule of Net Benefit Costs [Table Text Block] Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Interest Rate Swap Balances Interest Rate Swap Balances [Abstract] NotionalAmount [Domain] DerivativeContractDate [Domain] Original Notional Amount Notional Amounts as of December 31, 2011 Contracted Interest Rate Total Liability as of December 31, 2011 Energy Swap Balances Energy Swap Balances [Abstract] ConsumptionPeriod [Domain] Quantity used during consumption period. Quantity Price Per Unit (in Dollars per Item) Energy Swap Asset / (Liability) Deferred Tax Asset / (Liability) Changes Recorded in Accumulated Other Comprehensive Income Loss resulting from Energy Swap Agreements Changes Recorded in Accumulated Other Comprehensive Income Loss resulting from Energy Swap Agreements [Abstract] AccumulatedOtherComprehensiveIncome [Domain] Beginning balance Net loss (gain), net of tax, reclassified to unallocated inventory cost pool Net loss (gain), net of tax, reclassified to unallocated inventory cost pool