Revenue - Schedule of Subscription and Transaction Fees Disaggregated by Customer Category (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Disaggregation Of Revenue [Line Items]
Revenue	$ 118,349	$ 641,959	$ 238,265	$ 157,600
Subscription and Transaction Fees
Disaggregation Of Revenue [Line Items]
Revenue		633,365	232,255	136,405
Subscription and Transaction Fees | Small-to-midsize Business and Accounting Firm Customers
Disaggregation Of Revenue [Line Items]
Revenue		603,171	218,227	126,035
Subscription and Transaction Fees | Financial Institution Customers
Disaggregation Of Revenue [Line Items]
Revenue		30,194	14,028	10,370
Interest on Funds Held for Customers
Disaggregation Of Revenue [Line Items]
Revenue		$ 8,594	$ 6,010	$ 21,195