Income Taxes - Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Federal, current	$ 3,061	$ 1,696	$ 4
Federal, deferred	(106)	(248)	(89)
State and local, current	3,938	360	42
State and local, deferred	(1,721)	(66)	224
Income tax expense (benefit)	$ 5,172	$ 1,742	$ 181