Goodwill and Intangible Assets - Goodwill (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($)
Goodwill [Roll Forward]
Goodwill balance at beginning of period	$ 353,193
Effect of foreign exchange	(314)
Additions and adjustments as the result of acquisitions	115
Goodwill balance at end of period	$ 353,622