Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Jan. 01, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net income (loss)		$ 10,484		$ (34,539)
Other comprehensive income (loss):
Foreign currency translation loss, net of tax		(854)		(1,158)
Comprehensive income (loss)		9,630		(35,697)
Net income (loss)		$ 10,484		$ (34,539)
Predecessor [Member]
Net income (loss)	$ 298,582		$ (106,390)		$ (825,921)
Other comprehensive income (loss):
Foreign currency translation loss, net of tax			(288)		1,735
Comprehensive income (loss)	298,582		(106,678)		(824,186)
Net income (loss)	$ 298,582		$ (106,390)		$ (825,921)