Income Taxes Reconciliation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Computed at federal statutory rate	$ 15,272	$ 47,315	$ 9,701
State income taxes, net of federal income tax benefit	(1,494)	(1,743)	1,383
Change in valuation allowance	(14,240)	(48,820)	(24,353)
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	0	0	86,612
Effective Income Tax Rate Reconciliation, Reorganization Adjustments, Amount	0	0	10,760
Other, net	(389)	285	332
Income tax benefit	$ 2,137	$ 523	$ (4,943)
Effective Income Tax Rate Reconciliation, Percent	3.00%	0.20%	(17.80%)
Computed at federal statutory rate	21.00%	21.00%	35.00%
State income taxes, net of federal income tax benefit	2.10%	0.80%	(5.00%)
Change in valuation allowance	(19.60%)	(21.70%)	(87.80%)
Effective Income Tax Rate Reconciliation, Effect of rate change on valuation allowance, Amount	$ 0	$ 0	$ (86,612)
Effective Income Tax Rate Reconciliation, Effect of rate change on valuation allowance, Percent	0.00%	0.00%	(312.50%)
Effect of rate change	0.00%	0.00%	312.50%
Reorganization adjustments	0.00%	0.00%	38.80%
Other, net	(0.50%)	0.10%	1.20%