Comprehensive Income - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
AOCI beginning balance	$ (22,247)	$ 17,658	$ (25,122)	$ 12,449
Other comprehensive income before reclassifications	(9,858)	(18,215)	(6,983)	(13,006)
Net current-period other comprehensive income (loss)	(9,858)	(18,215)	(6,983)	(13,006)
AOCI ending balance	(32,105)	(557)	(32,105)	(557)
Pension Liability [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
AOCI beginning balance	(31,377)	(24,029)	(32,769)	(24,978)
Other comprehensive income before reclassifications		45		45
Amounts reclassified from AOCI	750	473	2,142	1,422
Net current-period other comprehensive income (loss)	750	518	2,142	1,467
AOCI ending balance	$ (30,627)	$ (23,511)	$ (30,627)	$ (23,511)