CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($)
Successor [Member]
Comprehensive income (loss)	$ 32,589
Net income (loss)	32,662
Other comprehensive income (loss):
Change in pension and postretirement obligations, net of tax of $0 for 2017, $39 for the Successor period from September 13, 2016 through December 31, 2016, $(226) for the Predecessor period from January 1, 2016 through September 12, 2016, and $93 for 2015.	(73)
Total other comprehensive income (loss), net of tax	$ (73)