Summary of Significant Accounting Policies - The Balances in the Company's Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ (39,110)
Total other comprehensive income (loss), net of income tax	4,915	$ (23,010)
Ending balance	(34,195)
Defined Benefit Pension Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(1,663)	(1,863)
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income, net of tax		0
Total other comprehensive income (loss), net of income tax	0	0
Ending balance	(1,663)	(1,863)
Foreign Currency [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(37,447)	(9,825)
Other comprehensive income (loss) before reclassifications	4,915	(12,519)
Amounts reclassified from accumulated other comprehensive income, net of tax		(10,491)
Total other comprehensive income (loss), net of income tax	4,915	(23,010)
Ending balance	(32,532)	(32,835)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(39,110)	(11,688)
Other comprehensive income (loss) before reclassifications	4,915	(12,519)
Amounts reclassified from accumulated other comprehensive income, net of tax		(10,491)
Total other comprehensive income (loss), net of income tax	4,915	(23,010)
Ending balance	$ (34,195)	$ (34,698)