CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 46,402	$ 13,630
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on derivative instruments and other assets	673	(2,622)
Foreign currency translation adjustments	0	(16,390)
Total comprehensive income (loss)	$ 47,075	$ (5,382)