Income Taxes - Components of Income Tax Provision (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Current tax provision (benefit)
U.S. federal	$ (1,521)	$ 10
State and local	(134)	109
Total current tax provision (benefit)	(1,655)	119
Deferred income tax provision (benefit)
U.S. federal	915	526
State and local	106	90
Total deferred income tax provision (benefit)	1,021	616
Income tax provision (benefit)	$ (634)	$ 735