Income Taxes - Income Tax Expense (Benefit) from Continuing Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current
Federal	$ 957	$ 7,270	$ 9,694
Foreign	1,390	497	1,218
State and local	1,014	2,123	1,575
Current Income Tax Expense (Benefit)	3,361	9,890	12,487
Deferred
Federal	8,702	(447)	(7,910)
Foreign	(326)	(538)	(718)
State and local	356	63	(822)
Deferred Income Tax Expense (Benefit)	$ 8,732	$ (922)	$ (9,450)