CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 91,744	$ (167,684)	$ 364,205	$ (138,790)
Other comprehensive income (loss):
Change in derivative instruments	403	(13,453)	6,717	(14,042)
Foreign currency translation adjustments	5,966	8,155	(10,277)	(6,781)
Comprehensive income (loss), before income tax on other comprehensive income items	98,113	(172,982)	360,645	(159,613)
Income tax provision (benefit) on derivative instruments	617	(3,023)	1,588	(3,453)
Comprehensive income (loss)	$ 97,496	$ (169,959)	$ 359,057	$ (156,160)