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, 2018	Dec. 31, 2017	Dec. 31, 2016
Valuation Allowance [Line Items]
Tax Credit Carryforward, Amount			$ 5,000
Income taxes receivable			2,471	$ 0
State			500
Other, net			$ 300
Future Federal Statutory Income Tax Rate, Percent			2100.00%
Liabilities for unrecognized tax benefits
Effective Income Tax Rate Reconciliation, Percent			0.20%
Deferred Tax Assets, Tax Credit Carryforwards			$ 2,500
Federal
Valuation Allowance [Line Items]
Operating Loss Carryforwards			$ 557,200
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]
State	0		$ 523	0
Other, net	$ 0		285	332
Liabilities for unrecognized tax benefits			0	0
Income Tax Examination, Penalties and Interest Expense			$ 0	$ 0
Effective Income Tax Rate Reconciliation, Percent	0.00%		0.20%	(17.80%)
Successor [Member] | State and Local Jurisdiction
Valuation Allowance [Line Items]
Operating Loss Carryforwards			$ 437,900
Successor [Member] | Federal, State and Local Tax Jurisdictions
Valuation Allowance [Line Items]
Deferred Tax Assets, Valuation Allowance				$ 128,700
Predecessor [Member]
Valuation Allowance [Line Items]
State		$ 0
Other, net		$ 20
Income Tax Examination, Penalties and Interest Expense					$ 0
Effective Income Tax Rate Reconciliation, Percent		0.00%