Revenue Recognition - Revenue by Geographic Location (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Total revenue		$ 118,327	$ 94,804	$ 345,823	$ 264,495
United States
Disaggregation of Revenue [Line Items]
Total revenue		80,096	58,561	229,802	166,668
Other Americas
Disaggregation of Revenue [Line Items]
Total revenue	[1]	4,009	3,979	11,917	9,047
Total Americas
Disaggregation of Revenue [Line Items]
Total revenue		84,105	62,540	241,719	175,715
EMEA
Disaggregation of Revenue [Line Items]
Total revenue	[2],[3]	23,399	22,290	68,092	61,473
APAC
Disaggregation of Revenue [Line Items]
Total revenue	[4]	10,823	9,974	36,012	27,307
United Kingdom
Disaggregation of Revenue [Line Items]
Total revenue		14,300	14,600	42,400	39,700
Netherlands
Disaggregation of Revenue [Line Items]
Total revenue		$ 1,200	$ 600	$ 3,700	$ 2,500

[1] Canada, Latin America and South America

[2] Includes revenues from the United Kingdom of $14.3 million and $14.6 million for the three months ended September 30, 2021 and 2020, respectively, and from the Netherlands of $1.2 million and $0.6 million for the three months ended September 30, 2021 and 2020, respectively. Includes revenues from the United Kingdom of $42.4 million and $39.7 million for the nine months ended September 30, 2021 and 2020, respectively, and from the Netherlands of $3.7 million and $2.5 million for the nine months ended September 30, 2021 and 2020, respectively.

[3] Europe, the Middle East and Africa (“EMEA”)

[4] Asia-Pacific (“APAC”)