Income Taxes - Summary of Reconciliation of Statutory Federal Income Tax (Benefit) Expense to Consolidated Actual Income Tax Benefit (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Statutory Federal income tax benefit at 21%	$ 655	$ 1,663	$ 4,067	$ 1,284
State and local income taxes, net of federal income tax benefit	122	194	760	87
Change in effective state income tax rate	196		149	686
Income attributable to non-controlling interest	50		(166)
Non deductible expenses	(198)		(789)
Other	28	(22)	81	34
Net benefit for income taxes	$ 853	$ 1,835	$ 4,102	$ 2,091