CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 86,388	$ 30,466	$ 220,634	$ 56,712
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on derivative instruments and other assets	1,117	821	2,570	(843)
Foreign currency translation adjustments	0	0	0	48,917
Total comprehensive income	$ 87,505	$ 31,287	$ 223,204	$ 104,786