CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 44,102	$ (28,328)	$ 95,566
Other comprehensive loss:
Unrealized gains on available-for-sale securities (net of taxes of $0, $183 and $208, respectively)	0	976	1,244
Reclassification adjustment for gains on available-for-sale securities included in net income (net of taxes of $508)	0	(2,880)	0
Foreign currency translation adjustments	(144,050)	(88,725)	(70,791)
Unfunded pension liability (net of taxes of $7, $248 and $123, respectively)	0	(657)	359
Other comprehensive loss	(144,050)	(91,286)	(69,188)
Comprehensive (loss) income	$ (99,948)	$ (119,614)	$ 26,378