Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Other Comprehensive Income (Loss), before Tax [Abstract]
Foreign currency translation adjustment	$ (118)	$ 268
Reclassification of net losses (gains) on derivative instruments	62	(143)
Other comprehensive (loss) income	(56)	125
Other Comprehensive Income (Loss), Tax [Abstract]
Foreign currency translation adjustment	0	0
Reclassification of net losses (gains) on derivative instruments	(25)	54
Other comprehensive (loss) income	(25)	54
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	(118)	268
Reclassification of net losses (gains) on derivative instruments	37	(89)
Other comprehensive (loss) income	(81)	$ 179
Accumulated Other Comprehensive Income [Abstract]
Foreign currency translation	1,237		$ 1,355
Derivative instruments designated as cash flow hedges	(8,977)		(9,014)
Pension and postretirement medical plans	(937)		(937)
Accumulated other comprehensive loss	$ (8,677)		$ (8,596)