Commitments and Credit Risk - Off-balance-sheet and Credit Risk (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Unused Commitments to Extend Credit	$ 491.6	$ 416.2
Commitments to originate fixed rate loans	$ 134.5
Weighted-average rate	4.04%
Commitments extended period	30 days
Diversified portfolio, loans	$ 801.6
Minimum
Term	12 months	12 months
Commitments to originate fixed rate loans rates	2.25%
Maximum
Term	24 months	24 months
Commitments to originate fixed rate loans rates	5.50%