Condensed Consolidated Statements Of Changes In Stockholders' Equity (Successor) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock Common Class A	Common Stock Common Class B	Common Stock Common Class C	Paid-In Capital	Accumulated Deficit	Total Stockholders' Equity	Noncontrolling Interests
Balance (in shares) at Feb. 08, 2018		3,862	25,875
Balance at Feb. 08, 2018	$ (5,005)		$ 3		$ 3,106	$ (8,114)	$ (5,005)
Equity-based compensation expense	3,466				3,466		3,466
Net loss	(33,754)					(13,330)	(13,330)	$ (20,424)
Balance (in shares) at Mar. 31, 2018		169,372		213,402
Balance at Mar. 31, 2018	3,419,693	$ 17		$ 21	1,402,888	(21,444)	1,381,482	2,038,211
Balance (in shares) at Feb. 08, 2018		3,862	25,875
Balance at Feb. 08, 2018	(5,005)		$ 3		3,106	(8,114)	(5,005)
Class A common shares released from possible redemption	966,384
Total revenue	263,022
Balance (in shares) at Sep. 30, 2018		175,957		204,922
Balance at Sep. 30, 2018	3,412,397	$ 18		$ 20	1,472,570	(21,071)	1,451,537	1,960,860
Balance (in shares) at Mar. 31, 2018		169,372		213,402
Balance at Mar. 31, 2018	3,419,693	$ 17		$ 21	1,402,888	(21,444)	1,381,482	2,038,211
Class A common shares redeemed (in shares)		9,589		9,589
Class A common shares redeemed	(437)	$ 1		$ (1)	90,872		90,872	(91,309)
Class C common shares issued in connection with the closing of the Business Combination (in shares)				1,109
Noncontrolling interest in SRII Opco issued in the Business Combination	8,758							8,758
Equity-based compensation expense	4,263				4,263		4,263
Restricted stock awards vested, net of taxes (in shares)		98
Net loss	(22,666)					(6,600)	(6,600)	(16,066)
Balance (in shares) at Jun. 30, 2018		179,059		204,922
Balance at Jun. 30, 2018	3,409,611	$ 18		$ 20	1,498,023	(28,044)	1,470,017	1,939,594
Purchase and retirement of Class A common shares and related sale of SRII Opco Common Units (in shares)		(3,102)
Total revenue	139,804
Purchase and retirement of Class A common shares and related sale of SRII Opco Common Units	(14,750)				(25,589)		(25,589)	10,839
Adjustment to valuation allowance related to prior redemption of noncontrolling interests and Class C common shares for Class A common shares	(468)				(468)		(468)
Equity-based compensation expense	604				604		604
Net loss	17,400					6,973	6,973	10,427
Balance (in shares) at Sep. 30, 2018		175,957		204,922
Balance at Sep. 30, 2018	3,412,397	$ 18		$ 20	1,472,570	(21,071)	1,451,537	1,960,860
Balance (in shares) at Dec. 31, 2018		180,072		202,170
Balance at Dec. 31, 2018	216,127	$ 18		$ 20	1,503,382	(1,532,813)	(29,393)	245,520
Equity-based compensation expense	2,679				2,679		2,679
Restricted stock awards vested, net of taxes (in shares)		338
Restricted stock awards vested, net of taxes	(142)				67		67	(209)
Net loss	(17,435)					(8,407)	(8,407)	(9,028)
Balance (in shares) at Mar. 31, 2019		180,410		202,170
Balance at Mar. 31, 2019	201,229	$ 18		$ 20	1,506,128	(1,541,220)	(35,054)	236,283
Balance (in shares) at Dec. 31, 2018		180,072		202,170
Balance at Dec. 31, 2018	216,127	$ 18		$ 20	1,503,382	(1,532,813)	(29,393)	245,520
Class A common shares released from possible redemption	0
Total revenue	378,310
Balance (in shares) at Sep. 30, 2019		182,765		199,988
Balance at Sep. 30, 2019	(495,470)	$ 18		$ 20	1,511,330	(1,881,162)	(369,794)	(125,676)
Balance (in shares) at Mar. 31, 2019		180,410		202,170
Balance at Mar. 31, 2019	201,229	$ 18		$ 20	1,506,128	(1,541,220)	(35,054)	236,283
Conversion of common shares from Class B to Class A at closing of Business Combination (in shares)		2,182		2,182
Conversion of common shares from Class B to Class A at closing of Business Combination					2,756		2,756	(2,756)
Equity-based compensation expense	840				840		840
Restricted stock awards vested, net of taxes (in shares)		44
Restricted stock awards vested, net of taxes	(23)				(8)		(8)	(15)
Net loss	11,599					2,245	2,245	9,354
Balance (in shares) at Jun. 30, 2019		182,636		199,988
Balance at Jun. 30, 2019	213,645	$ 18		$ 20	1,509,716	(1,538,975)	(29,221)	242,866
Total revenue	119,058
Equity-based compensation expense	1,506				1,506		1,506
Restricted stock awards vested, net of taxes (in shares)		129
Restricted stock awards vested, net of taxes	24				108		108	(84)
Net loss	(710,645)					(342,187)	(342,187)	(368,458)
Balance (in shares) at Sep. 30, 2019		182,765		199,988
Balance at Sep. 30, 2019	$ (495,470)	$ 18		$ 20	$ 1,511,330	$ (1,881,162)	$ (369,794)	$ (125,676)