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Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Pension Liability Adjustment, Other comprehensive income (loss):    
Pension Liability Adjustment, Balance at Beginning of the Period $ 1,387 $ 1,523
Pension Liability Adjustment, Other comprehensive income before reclassifications, net of taxes 0 0
Pension Liability Adjustment, Total other comprehensive income (loss) before reclassifications, net of taxes 1,387 1,523
Pension Liability Adjustment, Net amount reclassified to earnings (62) (82)
Pension Liability Adjustment, Balance at End of the Period 1,325 1,441
Fair Value of Derivatives, Other comprehensive income (loss):    
Fair Value of Derivatives, Balance at Beginning of the Period (318) (165)
Fair Value of Derivatives, Other comprehensive income before reclassifications, net of taxes 233 386
Fair Value of Derivatives, Total other comprehensive income (loss) before reclassifications, net of taxes (85) 221
Fair Value of Derivatives, Net amount reclassified to earnings 78 53
Fair Value of Derivatives, Balance at End of the Period (7) 274
Foreign Currency Translation Adjustment, Other comprehensive income (loss):    
Foreign Currency Translation Adjustment, Balance at Beginning of the Period (1,393) (1,442)
Foreign Currency Translation Adjustment, Other comprehensive income before reclassifications, net of taxes 24 356
Foreign Currency Translation Adjustment, Total other comprehensive income (loss) before reclassifications, net of taxes (1,369) (1,086)
Foreign Currency Translation Adjustment, Net amount reclassified to earnings 0 0
Foreign Currency Translation Adjustment, Balance at End of the period (1,369) (1,086)
Accumulated Other Comprehensive Income (loss), Other comprehensive income (loss):    
Accumulated Other Comprehensive Income (loss), Balance at Beginning of the period (324) (84)
Accumulated Other Comprehensive Income (loss), Other comprehensive income before reclassifications, net of taxes 257 742
Accumulated Other Comprehensive Income (loss), Total other comprehensive income (loss) before reclassifications, net of taxes (67) 658
Accumulated Other Comprehensive Income (loss), Net amount reclassified to earnings 16 (29)
Accumulated Other Comprehensive Income (loss), Balance at End of the period $ (51) $ 629