Accumulated Other Comprehensive Income - Schedules of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning of Period	$ (394)	$ 20,017
Other comprehensive income before reclassifications	(34,181)	(18,334)
Amounts reclassified from AOCI, net of tax	399	(2,077)
Total other comprehensive income (loss)	(33,782)	(20,411)
Ending of Period	(34,176)	(394)
Unrealized Gains on Investments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning of Period	471	429
Other comprehensive income before reclassifications	(55)	98
Amounts reclassified from AOCI, net of tax	(70)	(56)
Total other comprehensive income (loss)	(125)	42
Ending of Period	346	471
Cumulative Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning of Period	12,415	30,847
Other comprehensive income before reclassifications	(35,672)	(18,432)
Amounts reclassified from AOCI, net of tax	0	0
Total other comprehensive income (loss)	(35,672)	(18,432)
Ending of Period	(23,257)	12,415
Unrecognized Net Actuarial Loss and Prior Service Credit, Net
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning of Period	(13,280)	(11,259)
Other comprehensive income before reclassifications	1,546
Amounts reclassified from AOCI, net of tax	469	(2,021)
Total other comprehensive income (loss)	2,015	(2,021)
Ending of Period	$ (11,265)	$ (13,280)