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Income Taxes - Reconciliation of (Benefit) Provision for Income Taxes at Statutory Federal Tax Rate to Company's Actual Income Tax (Benefit) Provision (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2016	Oct. 01, 2016	Dec. 31, 2017	Dec. 31, 2015
Successor
Reconciliation Of Provision Of Income Taxes [Line Items]
Release of valuation allowance			$ (8,700)
Total (benefit) provision	$ 9		(8,749)
Successor | Parent
Reconciliation Of Provision Of Income Taxes [Line Items]
Computed at federal statutory rate	(116,891)		13,409
State taxes, net of federal benefit	(3,696)		(284)
Non-deductible expenses	144		1,711
Non-deductible debt costs	0		0
Stock-based compensation	306		1,109
Net effects of consolidating the non-controlling interests’ tax provisions	0		0
Discharge of debt and other reorganization related items	0		1,018
Return to provision adjustments	0		341,681
Impact of legislative changes	0		243,801
Release of valuation allowance	0		(8,719)
Change in valuation allowance	120,144		(602,452)
Other	2		(23)
Total (benefit) provision	$ 9		$ (8,749)
Predecessor
Reconciliation Of Provision Of Income Taxes [Line Items]
Total (benefit) provision		$ 11		$ 123
Predecessor | Parent
Reconciliation Of Provision Of Income Taxes [Line Items]
Computed at federal statutory rate		504,283		(1,512,325)
State taxes, net of federal benefit		10,512		(19,988)
Non-deductible expenses		462		816
Non-deductible debt costs		22,694		10,228
Stock-based compensation		5,884		6,700
Net effects of consolidating the non-controlling interests’ tax provisions		0		218,196
Discharge of debt and other reorganization related items		359,278		0
Return to provision adjustments		0		0
Impact of legislative changes		0		0
Release of valuation allowance		0		0
Change in valuation allowance		(903,102)		1,296,405
Other		0		1
Total (benefit) provision		$ 11		$ 33

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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