CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 14,780	$ 15,732	$ 41,669	$ 21,194
Other comprehensive loss:
Unrealized gain on available-for-sale securities			1,488
Reclassification of unrealized gain to realized gain on available-for-sale securities			(24,465)
Foreign currency translation adjustments	(16,822)	(15,370)	(25,360)	(6,151)
Total other comprehensive loss	(16,822)	(15,370)	(48,337)	(6,151)
Comprehensive income (loss)	$ (2,042)	$ 362	$ (6,668)	$ 15,043