CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Earnings
Beginning Balance at Dec. 31, 2018	$ 569,571	$ 52,936	$ 452,513	$ 64,122
Beginning Balance, Shares at Dec. 31, 2018		105,871
Stock-based compensation	648	$ (2)	650
Stock-based compensation, Shares		(3)
Net income (loss)	13,575			13,575
Ending Balance at Mar. 31, 2019	583,794	$ 52,934	453,163	77,697
Ending Balance, Shares at Mar. 31, 2019		105,868
Beginning Balance at Dec. 31, 2018	569,571	$ 52,936	452,513	64,122
Beginning Balance, Shares at Dec. 31, 2018		105,871
Net income (loss)	34,982
Ending Balance at Jun. 30, 2019	605,824	$ 52,971	453,749	99,104
Ending Balance, Shares at Jun. 30, 2019		105,942
Beginning Balance at Mar. 31, 2019	583,794	$ 52,934	453,163	77,697
Beginning Balance, Shares at Mar. 31, 2019		105,868
Stock-based compensation	623	$ 37	586
Stock-based compensation, Shares		74
Net income (loss)	21,407			21,407
Ending Balance at Jun. 30, 2019	605,824	$ 52,971	453,749	99,104
Ending Balance, Shares at Jun. 30, 2019		105,942
Beginning Balance at Dec. 31, 2019	1,143,022	$ 95,003	909,423	138,596
Beginning Balance, Shares at Dec. 31, 2019		190,007
Stock-based compensation	1,430	$ (12)	1,442
Stock-based compensation, Shares		(24)
Income tax withholdings related to equity awards	(15)	$ (1)	(14)
Income tax withholdings related to equity awards, Shares		(2)
Net income (loss)	42,028			42,028
Preferred dividend accretion	(2,500)			(2,500)
Payment of preferred dividends	(9,572)			(9,572)
Ending Balance at Mar. 31, 2020	1,174,393	$ 94,990	910,851	168,552
Ending Balance, Shares at Mar. 31, 2020		189,981
Beginning Balance at Dec. 31, 2019	1,143,022	$ 95,003	909,423	138,596
Beginning Balance, Shares at Dec. 31, 2019		190,007
Net income (loss)	(7,848)
Ending Balance at Jun. 30, 2020	1,317,501	$ 116,290	1,092,662	108,549
Ending Balance, Shares at Jun. 30, 2020		232,580
Beginning Balance at Mar. 31, 2020	1,174,393	$ 94,990	910,851	168,552
Beginning Balance, Shares at Mar. 31, 2020		189,981
Stock-based compensation	1,552	$ 254	1,298
Stock-based compensation, Shares		507
Issuances of common stock	211,638	$ 21,046	190,592
Issuances of common stock, Shares		42,092
Stock issuance costs	(10,079)		(10,079)
Net income (loss)	(49,876)			(49,876)
Preferred dividend accretion	(2,917)			(2,917)
Payment of preferred dividends	(7,210)			(7,210)
Ending Balance at Jun. 30, 2020	$ 1,317,501	$ 116,290	$ 1,092,662	$ 108,549
Ending Balance, Shares at Jun. 30, 2020		232,580