Funds Held for Customers - Summary of Gross Unrealized Losses And Fair Values (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Jun. 30, 2020
Funds Held For Customers [Line Items]
Fair value	$ 182,611	$ 66,781
Unrealized losses	(42)	(11)
Corporate Bonds
Funds Held For Customers [Line Items]
Fair value	146,789	31,785
Unrealized losses	(35)	(7)
U.S. Treasury Securities
Funds Held For Customers [Line Items]
Fair value		14,990
Unrealized losses		(1)
Certificates of Deposit
Funds Held For Customers [Line Items]
Fair value	29,756	20,006
Unrealized losses	(2)	$ (3)
Municipal Bonds
Funds Held For Customers [Line Items]
Fair value	6,066
Unrealized losses	$ (5)