Condensed Consolidated Statement of Stockholders' Equity (UNAUDITED) - USD ($)	Total		Common Stock	Additional Paid-in Capital	Accumulated Retained Earnings
Beginning balance, value at Dec. 31, 2017	$ 518,000,000		$ 1,000,000	$ 162,000,000	$ 355,000,000
Beginning balance, shares at Dec. 31, 2017			99,000,000
Net income	30,170,029	[1]	$ 0	0	30,000,000
Activity related to share-based compensation	(1,000,000)		0	(1,000,000)	0
Repurchase and retirement of common stock	(112,000,000)		$ 0	(3,000,000)	(109,000,000)
Repurchase and retirement of common stock, shares			(2,000,000)
Revenue recognition cumulative-effect adjustment	(38,000,000)		$ 0	0	(38,000,000)
Capital contribution	3,000,000		0	3,000,000	0
Ending balance, value at Mar. 31, 2018	400,000,000		$ 1,000,000	161,000,000	238,000,000
Ending balance, shares at Mar. 31, 2018			97,000,000
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	94,558,086		94,000,000
Net income	$ 55,067,801	[1]	$ 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	91,886,756		91,000,000

[1] Net income for the three months ended March 31, 2019 and 2018 was $55,067,801 and $30,170,029, respectively.