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Loans and Allowance for Credit Losses - Classes of loans (Details) $ in Thousands	12 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jul. 01, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Real Estate Loans	$ 2,311,631	$ 2,249,915
Loans in Process	(74,540)	(78,452)
Deferred loan fees, net	(3,625)	(4,395)
Allowance for credit losses	(33,222)	(25,139)	$ (25,139)	$ (19,903)	$ (18,214)
Total loans	$ 2,200,244	$ 2,141,929
Number of purchased participation loans	23	23
Purchased participation loans	$ 83,000	$ 58,200
Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Real Estate Loans	721,216	627,357
Allowance for credit losses	(11,192)	(4,875)	(4,875)	(3,706)	(3,226)
Construction Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Real Estate Loans	208,824	185,924
Allowance for credit losses	(2,170)	(2,010)	(2,010)	(1,365)	(1,097)
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Real Estate Loans	889,793	887,419
Allowance for credit losses	(14,535)	(12,132)	(12,132)	(9,399)	(8,793)
Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Real Estate Loans	77,674	80,767
Allowance for credit losses	(916)	(1,182)	(1,182)	(1,046)	(902)
Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Real Estate Loans	414,124	468,448
Allowance for credit losses	$ (4,409)	$ (4,940)	$ (4,940)	$ (4,387)	$ (4,196)

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Unearned discounts (other than cash or quantity discounts and the like), finance charges, and interest included in the face amount of receivables, that are shown as a deduction from the related receivables. For example, 1) finance charges booked as a receivable when a loan is made and recognized as income at a later date; and 2) interest charges deducted from the face loan amount, resulting in a discounted amount actually advanced to the borrower (wherein the receivable includes the amount actually advanced to the borrower and the as yet unearned interest income).

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Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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Amount, before allowance and fees, of loans and leases receivable. Excludes loans and leases covered under loss sharing agreements.

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Amount of undisbursed portion of the loan receivable balance (loans in process). Excludes loans and leases covered under loss sharing agreements.

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