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Other Current Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Other Liabilities, Current [Abstract]    
Payroll related $ 8,941 $ 11,852
Freight and rebates 2,408 2,624
Benefits and pensions 3,262 5,419
Accrual for Taxes Other than Income Taxes, Current 4,077 3,579
Accrued Income Taxes 8,677 9,278
Equity repurchases 3,729 4,737
Other 8,813 6,116
Other Liabilities, Current $ 39,907 $ 43,605