Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Valuation Allowance [Line Items]
Computed at federal statutory rate	21.00%	21.00%	35.00%
Income taxes receivable	$ 1,236	$ 2,471
State	2,137	523	$ 0
Other, net	(389)	285	332
Liabilities for unrecognized tax benefits	0	0
Deferred Tax Assets, Valuation Allowance	114,939	128,650
Income Tax Examination, Penalties and Interest Expense	$ 0	$ 0	$ 0
Effective Income Tax Rate Reconciliation, Percent	3.00%	0.20%	(17.80%)
Deferred Tax Assets, Tax Credit Carryforwards	$ 1,200
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	0	$ 0	$ 86,612
Federal
Valuation Allowance [Line Items]
Operating Loss Carryforwards	613,400
State and Local Jurisdiction
Valuation Allowance [Line Items]
Operating Loss Carryforwards	$ 437,900
Federal, State and Local Tax Jurisdictions
Valuation Allowance [Line Items]
Deferred Tax Assets, Valuation Allowance		$ 114,900