Consolidated Statements of Stockholders Equity Statement - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income(Loss)	Retained Earnings (Accumulated Deficit)
Beginning balance at Dec. 31, 2018	$ (1,076,769)	$ 2,905	$ 819,622	$ (5,800)	$ (1,893,496)
Beginning balance (shares) at Dec. 31, 2018		290,537,612
Comprehensive income (loss):
Net income	197,436				197,436
Commodity and foreign currency derivatives income, net of tax	27,113			27,113
Commodity and foreign currency derivatives reclassification adjustments, net of tax	(1,456)			(1,456)
Foreign currency translation adjustments	(3,539)			(3,539)
Other comprehensive (loss) income, net of tax	22,118			22,118
Stock Issued During Period, Shares, Employee Stock Ownership Plan		29,394
Stock-based compensation	293		293
Dividends paid to related-party	(19,502)				(19,502)
Payments of Dividends	(5,194)				(5,194)
Payments Related to Tax Withholding for Share-based Compensation	0
Ending balance at Mar. 31, 2019	(881,618)	$ 2,905	819,915	16,318	(1,720,756)
Ending balance (shares) at Mar. 31, 2019		290,537,612
Beginning balance at Dec. 31, 2019	(691,073)	$ 2,705	765,419	(7,361)	(1,451,836)
Beginning balance (shares) at Dec. 31, 2019		270,485,308
Comprehensive income (loss):
Net income	122,268				122,268
Commodity and foreign currency derivatives income, net of tax	(37,577)			(37,577)
Commodity and foreign currency derivatives reclassification adjustments, net of tax	(2,204)			(2,204)
Foreign currency translation adjustments	(17,168)			(17,168)
Other comprehensive (loss) income, net of tax	(56,949)			(56,949)
Stock-based compensation	405		405
Dividends paid to related-party	(16,933)				(16,933)
Payments of Dividends	(5,926)				(5,926)
Stock Repurchased and Retired During Period, Shares		(3,328,574)
Stock Repurchased and Retired During Period, Value	(30,099)	$ (33)	(9,700)		(20,366)
Shares Paid for Tax Withholding for Share Based Compensation		(7,465)
Payments Related to Tax Withholding for Share-based Compensation	(46)		21		(25)
Ending balance at Mar. 31, 2020	$ (680,379)	$ 2,672	$ 756,103	$ (64,310)	$ (1,374,844)
Ending balance (shares) at Mar. 31, 2020		267,178,663