Available for Sale Securities - Investments Pledged as Collateral to Secure Public Deposits and Securities Sold Under Agreements to Repurchase (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020
Debt Securities, Available-for-sale [Line Items]
Carrying value of investment and MBS pledged as collateral to secure public deposits and securities sold under agreements to repurchase	$ 155,600	$ 156,100
Mortgage-Backed Securities
Debt Securities, Available-for-sale [Line Items]
Carrying value of investment and MBS pledged as collateral to secure public deposits and securities sold under agreements to repurchase	95,400	82,000
Collateralized Mortgage Obligations
Debt Securities, Available-for-sale [Line Items]
Carrying value of investment and MBS pledged as collateral to secure public deposits and securities sold under agreements to repurchase	18,800	41,900
Obligations of states and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Carrying value of investment and MBS pledged as collateral to secure public deposits and securities sold under agreements to repurchase	41,400	32,000
Other securities
Debt Securities, Available-for-sale [Line Items]
Carrying value of investment and MBS pledged as collateral to secure public deposits and securities sold under agreements to repurchase	$ 0	$ 200