v3.21.2

Summary of Significant Accounting Policies - Disaggregation of Revenues by Major Source (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 Revenues	$ 126,736	$ 103,804	$ 366,829	$ 293,765
Subscription
Disaggregation of Revenue [Line Items]
Total Revenues	91,544	74,451	265,765	210,857
Transactional
Disaggregation of Revenue [Line Items]
Total Revenues	17,356	14,476	51,349	41,204
Services and Other
Disaggregation of Revenue [Line Items]
Total Revenues	$ 17,836	$ 14,877	$ 49,715	$ 41,704

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