Stockholders' Equity - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at December 31, 2013	$ 20,017
Other comprehensive income before reclassifications	(9,935)
Amounts reclassified from AOCI, net of tax	(64)
Net other comprehensive income (loss)	(9,999)
Balance at September 30, 2014	10,018
Unrealized Gains on Investments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at December 31, 2013	429
Other comprehensive income before reclassifications	15
Amounts reclassified from AOCI, net of tax	(32)	(45)
Net other comprehensive income (loss)	(17)
Balance at September 30, 2014	412
Cumulative Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at December 31, 2013	30,847
Other comprehensive income before reclassifications	(9,950)
Amounts reclassified from AOCI, net of tax	0
Net other comprehensive income (loss)	(9,950)
Balance at September 30, 2014	20,897
Unrecognized Net Actuarial Loss and Service Credit
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at December 31, 2013	(11,259)
Other comprehensive income before reclassifications	0
Amounts reclassified from AOCI, net of tax	(32)	91
Net other comprehensive income (loss)	(32)
Balance at September 30, 2014	$ (11,291)