Funds Held for Customers - Summary of Funds Held for Customers (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021
Funds Held For Customers [Line Items]
Total funds held for customers	$ 2,432,559	$ 2,209,248
Total funds held for customers, net of income earned by the Company	2,432,521	2,208,598
Other Current Assets
Funds Held For Customers [Line Items]
Less - income earned by the Company	(38)	(650)
Certificates of Deposit
Funds Held For Customers [Line Items]
Total funds held for customers	385,097	326,927
Restricted Cash and Other Receivables
Funds Held For Customers [Line Items]
Total funds held for customers	1,357,620	1,208,598
Restricted Cash Equivalents
Funds Held For Customers [Line Items]
Total funds held for customers	57,964	86,322
Corporate Bonds
Funds Held For Customers [Line Items]
Total funds held for customers	575,327	516,350
Asset Backed Securities
Funds Held For Customers [Line Items]
Total funds held for customers	35,712	25,085
U.S. Treasury Securities
Funds Held For Customers [Line Items]
Total funds held for customers	6,113	3,009
Municipal Bonds
Funds Held For Customers [Line Items]
Total funds held for customers	$ 14,726	$ 42,957