Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ 6,502	$ 3,575
Other comprehensive income before reclassifications	(4,545)	(1,368)
Amounts reclassified from accumulated other comprehensive income	(312)	(562)
Net increase in other comprehensive income	(4,857)	(1,930)
Ending balance	1,645	1,645
Foreign currency [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	5,532	3,153
Other comprehensive income before reclassifications	(4,354)	(1,975)
Amounts reclassified from accumulated other comprehensive income	0	0
Net increase in other comprehensive income	(4,354)	(1,975)
Ending balance	1,178	1,178
Change in unrealized gains on available-for-sale securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	970	422
Other comprehensive income before reclassifications	(191)	607
Amounts reclassified from accumulated other comprehensive income	(312)	(562)
Net increase in other comprehensive income	(503)	45
Ending balance	$ 467	$ 467