Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ 3,575
Other comprehensive income before reclassifications	1,109
Amounts reclassified from accumulated other comprehensive income	(181)
Net increase in other comprehensive income	928
Ending balance	4,503
Foreign currency [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	3,153
Other comprehensive income before reclassifications	461
Amounts reclassified from accumulated other comprehensive income	0
Net increase in other comprehensive income	461
Ending balance	3,614
Change in unrealized gains on available-for-sale securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	422
Other comprehensive income before reclassifications	648
Amounts reclassified from accumulated other comprehensive income	(181)
Net increase in other comprehensive income	467
Ending balance	$ 889