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Accrued Liabilities (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Accrued Liabilities [Abstract] |  |
Salaries and wages | $ 18,007 | $ 18,066
Accrual for compensated absences | 12,985 | 12,931
Employee benefits | 9,627 | 9,356
Pension liability - current portion | 2,318 | 3,576
Postretirement medical benefits - current portion | 5,547 | 5,949
Returns and allowances | 19,536 | 15,609
Interest | 3,062 | 3,426
Restructuring costs | 4,947 | 6,979
Dividends |  | 4,069
Workers' compensation | 2,924 | 3,244
Billings in excess of revenue recognized | 4,920 | 1,881
Professional fees | 3,173 | 4,214
Utilities | 1,073 | 1,583
Other | 15,138 | 14,221
Total | $ 103,257 | $ 105,104

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