Long-Term Debt and Interest Expense - Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Debt Instrument [Line Items]
Cash payments for interest			$ 9,300	$ 32,600
Successor
Debt Instrument [Line Items]
Cash payments for interest	$ 8,040		9,308
Commitment and other fees paid	170		187
Amortization of debt issuance costs and discounts	2,321		3,881
Change in accrued interest	(1,364)		4,878
Other	12		35
Total interest expense	$ 9,179		$ 18,289
Predecessor
Debt Instrument [Line Items]
Cash payments for interest		$ 13,862		32,560
Commitment and other fees paid		599		1,272
Amortization of debt issuance costs and discounts		1,426		4,348
Change in accrued interest		6,617		5,010
Other		17		45
Total interest expense		$ 22,521		$ 43,235