Income Tax - Schedule of Consolidated Deferred Tax Asset and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Financial statement accruals not currently deductible	$ 6,580	$ 4,652
Net operating loss, AMT credit and other carryforwards	44,154	45,521
State taxes	35	70
Operating lease liabilities under ASC 842	14,909	16,618
Other	11,222	6,847
Total deferred tax assets	76,900	73,708
Valuation allowance for deferred tax assets	(48,073)	(12,977)
Net deferred tax assets	28,827	60,731
Deferred tax liabilities:
Excess of net book value of property and equipment and software for financial reporting purposes over tax basis	1,065	2,391
Excess of net book value of intangible assets for financial reporting purposes over tax basis	84,163	82,939
Operating lease right-of-use assets under ASC 842	12,482	14,179
Other	0
Total deferred tax liabilities	97,710	99,509
Net deferred tax liabilities	$ (68,883)	$ (38,778)