Condensed Consolidated Statements of Stockholders' Equity (UNAUDITED) - USD ($)		Total		Common Stock	Additional Paid-in Capital	Accumulated Retained Earnings
Beginning balance, value at Dec. 31, 2018		$ 616,000,000		$ 1,000,000	$ 174,000,000	$ 441,000,000
Beginning balance, shares at Dec. 31, 2018				94,000,000
Net income (loss)		55,000,000		$ 0	0	55,000,000
Activity related to share-based compensation		1,000,000		0	1,000,000	0
Repurchase and retirement of common stock		(97,000,000)		$ 0	(5,000,000)	(92,000,000)
Repurchase and retirement of common stock, shares				(3,000,000)
Ending balance, value at Mar. 31, 2019		575,000,000		$ 1,000,000	170,000,000	404,000,000
Ending balance, shares at Mar. 31, 2019				91,000,000
Beginning balance, value at Dec. 31, 2018		616,000,000		$ 1,000,000	174,000,000	441,000,000
Beginning balance, shares at Dec. 31, 2018				94,000,000
Net income (loss)	[1]	93,692,657
Ending balance, value at Jun. 30, 2019		450,000,000		$ 1,000,000	169,000,000	280,000,000
Ending balance, shares at Jun. 30, 2019				86,000,000
Beginning balance, value at Mar. 31, 2019		575,000,000		$ 1,000,000	170,000,000	404,000,000
Beginning balance, shares at Mar. 31, 2019				91,000,000
Net income (loss)		38,624,856	[1]	$ 0	0	39,000,000
Activity related to share-based compensation		10,000,000		0	10,000,000	0
Repurchase and retirement of common stock		(174,000,000)		$ 0	(11,000,000)	(163,000,000)
Repurchase and retirement of common stock, shares				(5,000,000)
Ending balance, value at Jun. 30, 2019		450,000,000		$ 1,000,000	169,000,000	280,000,000
Ending balance, shares at Jun. 30, 2019				86,000,000
Beginning balance, value at Dec. 31, 2019		$ 570,000,000		$ 1,000,000	179,000,000	390,000,000
Beginning balance, shares at Dec. 31, 2019		85,535,501		85,000,000
Net income (loss)		$ 8,000,000		$ 0	0	8,000,000
Activity related to share-based compensation		(5,000,000)		0	(5,000,000)	0
Repurchase and retirement of common stock		(10,000,000)		$ 0	(2,000,000)	(8,000,000)
Repurchase and retirement of common stock, shares				(1,000,000)
Ending balance, value at Mar. 31, 2020		563,000,000		$ 1,000,000	172,000,000	390,000,000
Ending balance, shares at Mar. 31, 2020				84,000,000
Beginning balance, value at Dec. 31, 2019		$ 570,000,000		$ 1,000,000	179,000,000	390,000,000
Beginning balance, shares at Dec. 31, 2019		85,535,501		85,000,000
Net income (loss)	[1]	$ (39,924,584)
Ending balance, value at Jun. 30, 2020		$ 523,000,000		$ 1,000,000	180,000,000	342,000,000
Ending balance, shares at Jun. 30, 2020		85,077,503		84,000,000
Beginning balance, value at Mar. 31, 2020		$ 563,000,000		$ 1,000,000	172,000,000	390,000,000
Beginning balance, shares at Mar. 31, 2020				84,000,000
Net income (loss)		(47,751,330)	[1]	$ 0	0	(48,000,000)
Activity related to share-based compensation		8,000,000		0	8,000,000	0
Ending balance, value at Jun. 30, 2020		$ 523,000,000		$ 1,000,000	$ 180,000,000	$ 342,000,000
Ending balance, shares at Jun. 30, 2020		85,077,503		84,000,000

[1] Net income (loss) for the three months ended June 30, 2020 and 2019 was $(47,751,330) and $38,624,856, respectively, and for the six months ended June 30, 2020 and 2019 was $(39,924,584) and $93,692,657, respectively.