Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands		12 Months Ended
	Jan. 01, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net income		$ 22,457
Other comprehensive income (loss):
Foreign currency translation gain (loss), net of income tax (expense) benefit of ($777), ($31) and $1,369 as of December 31, 2017, 2016 and 2015 respectively		(580)
Comprehensive income (loss)		$ 21,877
Predecessor [Member]
Net income	$ 298,582		$ (944,289)	$ (872,542)
Other comprehensive income (loss):
Foreign currency translation gain (loss), net of income tax (expense) benefit of ($777), ($31) and $1,369 as of December 31, 2017, 2016 and 2015 respectively			1,425	(3,980)
Comprehensive income (loss)	$ 298,582		$ (942,864)	$ (876,522)