Funds Held for Customers - Summary of Gross Unrealized Losses And Fair Values (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Funds Held For Customers [Line Items]
Fair value	$ 82,018	$ 66,781
Unrealized losses	(18)	(11)
Certificates of Deposit
Funds Held For Customers [Line Items]
Fair value	17,255	20,006
Unrealized losses	(2)	(3)
Municipal Bonds
Funds Held For Customers [Line Items]
Fair value	6,064
Unrealized losses	(2)
Corporate Bonds
Funds Held For Customers [Line Items]
Fair value	58,699	31,785
Unrealized losses	$ (14)	(7)
U.S. Treasury Securities
Funds Held For Customers [Line Items]
Fair value		14,990
Unrealized losses		$ (1)