Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	4 Months Ended	8 Months Ended	12 Months Ended
	Dec. 31, 2016	Sep. 12, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Valuation Allowance [Line Items]
Other, net			$ 300
Future Federal Statutory Income Tax Rate, Percent			2100.00%
Liabilities for unrecognized tax benefits
Deferred Tax Assets, Valuation Allowance	$ 288,408		$ 177,470	$ 288,408
Federal
Valuation Allowance [Line Items]
Operating Loss Carryforwards			$ 385,700
Federal | Minimum
Valuation Allowance [Line Items]
Operating Loss Carryforwards Expiration Year			2032
Federal | Maximum
Valuation Allowance [Line Items]
Operating Loss Carryforwards Expiration Year			2037
State and Local Jurisdiction | Minimum
Valuation Allowance [Line Items]
Operating Loss Carryforwards Expiration Year			2024
State and Local Jurisdiction | Maximum
Valuation Allowance [Line Items]
Operating Loss Carryforwards Expiration Year			2037
Successor [Member]
Valuation Allowance [Line Items]
Other, net	0		$ 332
Liabilities for unrecognized tax benefits	0		0	0
Income Tax Examination, Penalties and Interest Expense			0	0
Successor [Member] | State and Local Jurisdiction
Valuation Allowance [Line Items]
Operating Loss Carryforwards			$ 446,700
Successor [Member] | Federal, State and Local Tax Jurisdictions
Valuation Allowance [Line Items]
Deferred Tax Assets, Valuation Allowance	$ 177,500			$ 177,500
Predecessor [Member]
Valuation Allowance [Line Items]
Other, net		$ 20			104
Income Tax Examination, Penalties and Interest Expense					$ 0