Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	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 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