Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Senior Note Holders [Member] Common Stock [Member]	Senior Note Holders [Member] Additional Paid-in Capital [Member]	Senior Note Holders [Member]	Predecessor Unit Holders [Member] Common Stock [Member]	Predecessor Unit Holders [Member] Additional Paid-in Capital [Member]	Predecessor Unit Holders [Member]	Common Unitholders	General Partner Interest	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings (Accumulated Deficit) [Member]	Total
Beginning Balance (Predecessor) at Dec. 31, 2017							$ 648,371	$ (20,359)					$ 628,012
Net loss | Predecessor							(15,140)	(309)					(15,449)
Equity-based compensation | Predecessor							575	12					587
Ending Balance (Predecessor) at Mar. 31, 2018							633,806	(20,656)					613,150
Beginning Balance (Predecessor) at Dec. 31, 2017							648,371	(20,359)					628,012
Net loss | Predecessor													(610,525)
Ending Balance at May. 31, 2018									$ 100	$ 248,578			248,678
Ending Balance (in shares) at May. 31, 2018									10,000
Beginning Balance (Predecessor) at Mar. 31, 2018							633,806	(20,656)					613,150
Contributions from general partner | Predecessor								40					40
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
Issuance of warrants										9,345			9,345
Net loss | Predecessor							(583,174)	(11,902)					(595,076)
Equity-based compensation | Predecessor							$ 3,133	$ 64					3,197
Ending Balance at May. 31, 2018									$ 100	248,578			248,678
Ending Balance (in shares) at May. 31, 2018									10,000
Net loss												$ (538)	(538)
Ending Balance at Jun. 30, 2018									$ 100	248,578		(538)	248,140
Ending Balance (in shares) at Jun. 30, 2018									10,000
Beginning Balance at Dec. 31, 2018									$ 100	249,717	$ (247)	23,969	273,539
Beginning Balance (in shares) at Dec. 31, 2018									10,043
Net loss												(35,775)	(35,775)
Share-based compensation										61			61
Ending Balance at Mar. 31, 2019									$ 100	249,778	(247)	(11,806)	237,825
Ending Balance (in shares) at Mar. 31, 2019									10,043
Beginning Balance at Dec. 31, 2018									$ 100	249,717	(247)	23,969	273,539
Beginning Balance (in shares) at Dec. 31, 2018									10,043
Net loss													(96,682)
Ending Balance at Jun. 30, 2019									$ 101	250,414	(414)	(72,713)	177,388
Ending Balance (in shares) at Jun. 30, 2019									10,118
Beginning Balance at Mar. 31, 2019									$ 100	249,778	(247)	(11,806)	237,825
Beginning Balance (in shares) at Mar. 31, 2019									10,043
Net loss												(60,907)	(60,907)
Share-based compensation										637			637
Restricted shares vested									$ 1	(1)
Restricted shares vested (in shares)									87
Purchase of treasury stock											(167)		(167)
Purchase of treasury stock (in shares)									(12)
Ending Balance at Jun. 30, 2019									$ 101	$ 250,414	$ (414)	$ (72,713)	$ 177,388
Ending Balance (in shares) at Jun. 30, 2019									10,118