CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Earnings (Deficit)
Beginning Balance (in shares) at Dec. 31, 2019		190,007
Beginning Balance at Dec. 31, 2019	$ 1,143,022	$ 95,003	$ 909,423	$ 138,596
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation (in shares)		24
Stock-based compensation	1,430	$ (12)	1,442
Income tax withholdings on equity awards (in shares)		(2)
Income tax withholdings on equity awards	(15)	$ (1)	(14)
Net income (loss)	42,028			42,028
Preferred stock accretion	(2,500)			(2,500)
Payment of preferred dividends	(9,572)			(9,572)
Ending Balance (in shares) at Mar. 31, 2020		189,981
Ending Balance at Mar. 31, 2020	1,174,393	$ 94,990	910,851	168,552
Beginning Balance (in shares) at Dec. 31, 2019		190,007
Beginning Balance at Dec. 31, 2019	1,143,022	$ 95,003	909,423	138,596
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(7,848)
Ending Balance (in shares) at Jun. 30, 2020		232,580
Ending Balance at Jun. 30, 2020	1,317,501	$ 116,290	1,092,662	108,549
Beginning Balance (in shares) at Mar. 31, 2020		189,981
Beginning Balance at Mar. 31, 2020	1,174,393	$ 94,990	910,851	168,552
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation (in shares)		507
Stock-based compensation	1,552	$ 254	1,298
Issuances of common stock (in shares)		42,092
Income tax withholdings on equity awards	211,638	$ 21,046	190,592
Stock issuance costs	(10,079)		(10,079)
Net income (loss)	(49,876)			(49,876)
Preferred stock accretion	(2,917)			(2,917)
Payment of preferred dividends	(7,210)			(7,210)
Ending Balance (in shares) at Jun. 30, 2020		232,580
Ending Balance at Jun. 30, 2020	1,317,501	$ 116,290	1,092,662	108,549
Beginning Balance (in shares) at Dec. 31, 2020		232,415
Beginning Balance at Dec. 31, 2020	1,266,773	$ 116,206	1,095,384	55,183
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation (in shares)		4
Stock-based compensation	1,690		1,690
Stock issuance costs	(30)		(30)
Net income (loss)	(134,125)			(134,125)
Payment of preferred dividends	(4,315)			(4,315)
Ending Balance (in shares) at Mar. 31, 2021		232,411
Ending Balance at Mar. 31, 2021	1,129,993	$ 116,206	1,097,044	(83,257)
Beginning Balance (in shares) at Dec. 31, 2020		232,415
Beginning Balance at Dec. 31, 2020	1,266,773	$ 116,206	1,095,384	55,183
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(313,820)
Ending Balance (in shares) at Jun. 30, 2021		232,850
Ending Balance at Jun. 30, 2021	947,410	$ 116,425	1,098,300	(267,315)
Beginning Balance (in shares) at Mar. 31, 2021		232,411
Beginning Balance at Mar. 31, 2021	1,129,993	$ 116,206	1,097,044	(83,257)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation (in shares)		472
Stock-based compensation	1,799	$ 235	1,564
Income tax withholdings on equity awards (in shares)		(33)
Income tax withholdings on equity awards	(198)	$ (16)	(182)
Stock issuance costs	(126)		(126)
Net income (loss)	(179,695)			(179,695)
Payment of preferred dividends	(4,363)			(4,363)
Ending Balance (in shares) at Jun. 30, 2021		232,850
Ending Balance at Jun. 30, 2021	$ 947,410	$ 116,425	$ 1,098,300	$ (267,315)