Income Taxes - Schedule of Provision for Income Taxes from Continuing Operations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
State and local	$ 2,110	$ 754	$ 524
Total current provision	2,110	754	524
Federal	15,425	19,230	16,144
State and local	4,941	2,444	1,893
Total deferred provision	20,366	21,674	18,037
Total provision for income taxes	$ 22,476	$ 22,428	$ 18,561