Summary of Significant Accounting Policies - The Balances in the Company's Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ (11,688)
Total other comprehensive income (loss), net of tax	(27,422)	$ (14,115)	$ (8,216)
Ending balance	(39,110)	(11,688)
Defined Benefit Pension Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(1,863)	(1,066)	(2,142)
Other comprehensive income (loss) before reclassifications	144	(826)	1,005
Amounts reclassified from accumulated other comprehensive income, net of tax	56	29	71
Total other comprehensive income (loss), net of tax	200	(797)	1,076
Ending balance	(1,663)	(1,863)	(1,066)
Foreign Currency [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(9,825)	3,493	12,785
Other comprehensive income (loss) before reclassifications	(17,131)	(13,318)	(9,292)
Amounts reclassified from accumulated other comprehensive income, net of tax	(10,491)	0	0
Total other comprehensive income (loss), net of tax	(27,622)	(13,318)	(9,292)
Ending balance	(37,447)	(9,825)	3,493
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(11,688)	2,427	10,643
Other comprehensive income (loss) before reclassifications	(16,987)	(14,144)	(8,287)
Amounts reclassified from accumulated other comprehensive income, net of tax	(10,435)	29	71
Total other comprehensive income (loss), net of tax	(27,422)	(14,115)	(8,216)
Ending balance	$ (39,110)	$ (11,688)	$ 2,427