Income Taxes - Income Tax Expense (Benefit) from Continuing Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current
Federal	$ 9,694	$ 6,304	$ 5,684
Foreign	1,218	1,821	515
State and local	1,575	2,402	641
Current Income Tax Expense (Benefit)	12,487	10,527	6,840
Deferred
Federal	(7,910)	(4,394)	(413)
Foreign	(718)	(883)	741
State and local	(822)	(386)	227
Deferred Income Tax Expense (Benefit)	$ (9,450)	$ (5,663)	$ 555