Income Taxes - Income Tax Expense Components (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ 14,123	$ 9,700	$ 12,995
State	5,698	4,035	3,243
Foreign	1,537	2,418	1,476
Total current	21,358	16,153	17,714
Deferred:
Federal	320	4,072	(9,425)
State	(25)	1,452	2,749
Foreign	(418)	(250)	72
Total deferred	(123)	5,274	(6,604)
Income tax expense	$ 21,235	$ 21,427	$ 11,110