Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
U.S. federal and state	$ 1,546	$ 1,065	$ 9,077
Foreign	9,525	9,530	8,320
Deferred:
U.S. federal and state	1,643	4,051	389
Foreign	1,397	3,896	(2,747)
Provision for income taxes	$ 14,111	$ 18,542	$ 15,039