UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 8,960	$ 10,502
Other comprehensive loss:
Unrealized gains (losses) on available-for-sale securities (net of taxes of $152 and $70 respectively)	860	(549)
Reclassification adjustment for gains on available-for-sale securities included in net income (net of taxes of $496)	(2,812)	0
Foreign currency translation adjustments	(39,573)	(23,312)
Other comprehensive loss	(41,525)	(23,861)
Comprehensive loss	$ (32,565)	$ (13,359)