Income Taxes - Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Federal
Current	$ (127)	$ 3,061	$ 1,696
Deferred	(6,266)	(106)	(248)
State and local
Current	668	3,938	360
Deferred	2,028	(1,721)	(66)
Income tax expense (benefit), net	$ (3,697)	$ 5,172	$ 1,742