Accumulated Other Comprehensive Income (Loss) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($)
Accumulated other comprehensive loss, tax
Accumulated other comprehensive loss at the beginning of the period	$ 9,612
Amounts reclassified from accumulated other comprehensive income (loss)	(537)
Current-period other comprehensive income (loss) activity	918
Accumulated other comprehensive loss at the end of the period	9,993
Accumulated other comprehensive loss, net of tax
Accumulated other comprehensive loss at the beginning of the period	(66,558)
Amounts reclassified from accumulated other comprehensive income (loss)	840
Current-period other comprehensive income (loss) activity	(1,532)
Accumulated other comprehensive loss at the end of the period	(67,250)
Cumulative Translation Adjustment [Member]
Accumulated other comprehensive loss, before tax
Accumulated other comprehensive loss at the beginning of the period	(24,800)
Amounts reclassified from accumulated other comprehensive income (loss)	0
Current-period other comprehensive income (loss) activity	(920)
Accumulated other comprehensive loss at the end of the period	(25,720)
Cash Flow Hedges [Member]
Accumulated other comprehensive loss, before tax
Accumulated other comprehensive loss at the beginning of the period	(1,598)
Amounts reclassified from accumulated other comprehensive income (loss)	883
Current-period other comprehensive income (loss) activity	(1,530)
Accumulated other comprehensive loss at the end of the period	(2,245)
Defined Benefit Plans [Member]
Accumulated other comprehensive loss, before tax
Accumulated other comprehensive loss at the beginning of the period	(49,772)
Amounts reclassified from accumulated other comprehensive income (loss)	494
Current-period other comprehensive income (loss) activity	0
Accumulated other comprehensive loss at the end of the period	$ (49,278)