Summary of Significant Accounting Policies - The Balances in the Company's Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ 97,703
Ending balance	98,775
Foreign Currency [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(37,447)	$ (9,825)
Other comprehensive income (loss) before reclassifications	6,009	(22,227)
Amounts reclassified from accumulated other comprehensive income, net of tax		(10,491)
Net current-period other comprehensive income (loss)	6,009	(32,718)
Ending balance	(31,438)	(42,543)
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
Net current-period other comprehensive income (loss)	0	0
Ending balance	(1,663)	(1,863)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(39,110)	(11,688)
Other comprehensive income (loss) before reclassifications	6,009	(22,227)
Amounts reclassified from accumulated other comprehensive income, net of tax		(10,491)
Net current-period other comprehensive income (loss)	6,009	(32,718)
Ending balance	$ (33,101)	$ (44,406)