Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ 4,503	$ 3,575
Other comprehensive income before reclassifications	2,069	3,177
Amounts reclassified from accumulated other comprehensive income	(70)	(250)
Net increase in other comprehensive income	1,999	2,927
Ending balance	6,502	6,502
Foreign currency [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	3,614	3,153
Other comprehensive income before reclassifications	1,918	2,379
Amounts reclassified from accumulated other comprehensive income	0	0
Net increase in other comprehensive income	1,918	2,379
Ending balance	5,532	5,532
Change in unrealized gains on available-for-sale securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	889	422
Other comprehensive income before reclassifications	151	798
Amounts reclassified from accumulated other comprehensive income	(70)	(250)
Net increase in other comprehensive income	81	548
Ending balance	$ 970	$ 970