Income Taxes - Income/(loss) before income taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
U.S.	$ 5,673	$ 33,417	$ 37,060
Foreign	11,955	9,588	7,306
Income before income tax benefit	$ 17,628	$ 43,005	$ 44,366