Revenue recognition - Deferred Contracts Costs Rollforward (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Deferred contract costs [Roll Forward]
Balance at Beginning of Period	$ 44,545	$ 25,837
Additions	27,381	15,724
Amortization Expense	(13,965)	(7,233)
Balance at End of Period	$ 57,961	$ 34,328