Consolidated Statements of Changes in Owners' Equity - USD ($) shares in Thousands, $ in Thousands	Common Unitholders	General Partner Interest	Senior Note Holders Common Stock	Senior Note Holders Additional Paid-in Capital	Senior Note Holders	Predecessor Unit Holders Common Stock	Predecessor Unit Holders Additional Paid-in Capital	Predecessor Unit Holders	Common Stock	Common Stock Outstanding [Member]	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Total
Beginning Balance (Predecessor) at Dec. 31, 2015	$ 1,011,509	$ (12,950)												$ 998,559
Distributions | Predecessor	(3,793)	(75)												(3,868)
Equity-based compensation | Predecessor	6,479	132												6,611
Net income (loss) | Predecessor	(238,037)	(4,858)												(242,895)
Ending Balance (Predecessor) at Dec. 31, 2016	776,158	(17,751)												758,407
Equity-based compensation | Predecessor	3,730	76												3,806
Net income (loss) | Predecessor	(131,517)	(2,684)												(134,201)
Ending Balance (Predecessor) at Dec. 31, 2017	648,371	(20,359)												628,012
Contributions from general partner | Predecessor		40												40
Equity-based compensation | Predecessor	3,708	76												3,784
Net income (loss) | Predecessor	(598,314)	(12,211)												(610,525)
Issuance of common stock to Predecessor common unitholders | Predecessor	(11,967)													(11,967)
Issuance of warrants to Predecessor common unitholders | Predecessor	(9,345)													(9,345)
Cancellation of Predecessor common unitholders | Predecessor	$ (32,453)													(32,453)
Cancellation of Predecessor general partner interest | Predecessor		$ 32,454												32,454
Issuance of successor commons stock to predecessor equity			9,500			500
Issuance of successor commons stock to predecessor equity, value			$ 95	$ 227,271	$ 227,366	$ 5	$ 11,962	$ 11,967						100
Issuance of warrants											$ 9,345			9,345
Stockholders' Equity Attributable to Parent, Ending Balance at May. 31, 2018									$ 100		248,578			248,678
Shares, Outstanding, Ending Balance at May. 31, 2018									10,000
Net income (loss)													$ 23,969	23,969
Share–based compensation											1,139			1,139
Restricted shares vested (in shares)									55
Purchase of treasury stock												$ (247)		(247)
Purchase of treasury stock (in shares)										(12)
Stockholders' Equity Attributable to Parent, Ending Balance at Dec. 31, 2018									$ 100		$ 249,717	$ (247)	$ 23,969	$ 273,539
Shares, Outstanding, Ending Balance at Dec. 31, 2018									10,043