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COMMITMENTS AND CONTINGENCIES - Summary Of Financial Instruments And Outstanding Amounts Represent Credit Risk (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Jun. 30, 2023
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Commitments to grant loans |  |
Loan Commitments [Line Items] |  |
Allowance for credit losses on off-balance sheet exposures | $ 0 | $ 608
Unadvanced funds on equity lines of credit |  |
Loan Commitments [Line Items] |  |
Allowance for credit losses on off-balance sheet exposures | 3,940 | 4,089
Unadvanced funds on commercial and other lines of credit |  |
Loan Commitments [Line Items] |  |
Allowance for credit losses on off-balance sheet exposures | $ 789 | $ 871

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- Definition Amount of expected credit loss for credit exposure on off-balance-sheet commitment, including but not limited to, loan commitment, standby letter of credit, financial guarantee not accounted for as insurance. Excludes off-balance sheet credit exposure accounted for as insurance and instrument accounted for under derivatives and hedging. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479344/326-20-45-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482454/460-10-45-1 + Details
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