Goodwill - Schedule of Goodwill Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill
Net balance at beginning of period	$ 91,841	$ 56,332
Adjustment to provisional estimate of acquisition date fair values	1,128
Additions		38,167
Net foreign currency translation	1,643	(2,658)
Net balance at end of period	94,612	91,841	$ 56,332
Goodwill impairment	$ 0	$ 0	$ 0