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EMPLOYEE BENEFIT PLANS - Additional Information (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2023 | Dec. 31, 2022 | Jun. 30, 2023
Employee Stock Ownership Plan (ESOP), Number of Committed-to-be-Released Shares per year | 255,648 |  | 255,648 |  |
ESOP loan balance | $ 2,400,000 |  | $ 2,400,000 |  |
Debt Instrument, Term |  |  | 25 years |  |
Defined benefit plan, Contributions by employer | 675,000 | $ 675,000 | $ 675,000 | $ 675,000 |
Pentegra DB Plan [Member] |  |  |  |  |
Defined benefit plan, Service cost | 195,000 | 130,000 | $ 390,000 | 325,000 |
FourHundredAndOne K Plan [Member] |  |  |  |  |
Defined contribution plan, Employer matching contribution, Percent of employees gross pay |  |  | 3.00% |  |
Defined contribution plan, Employer discretionary contribution amount | 5,000 | 4,000 | $ 11,000 | 10,000 |
FourHundredAndOne K Plan [Member] | Maximum [Member] |  |  |  |  |
Defined contribution plan, Voluntary contributions by Employees, Percent |  |  | 15.00% |  |
Defined contribution plan, Employer matching contribution, Percent of match |  |  | 10.00% |  |
FourHundredAndOne K Plan [Member] | Minimum [Member] |  |  |  |  |
Defined contribution plan, Voluntary contributions by Employees, Percent |  |  | 2.00% |  |
Supplemental Employee Retirement Plan [Member] |  |  |  |  |
Liability, Defined benefit plan | 909,000 |  | $ 909,000 |  | $ 877,000
Pension and other postretirement benefits, Expenses | 16,000 | 16,000 | 32,000 | 31,000 |
Postretirement Life Insurance [Member] | Split Dollar Agreements [Member] |  |  |  |  |
Pension and other postretirement benefits, Expenses | 19,000 | $ 29,000 | 38,000 | $ 58,000 |
Cash surrender value of life insurance | 4,500,000 |  | 4,500,000 |  | 4,500,000
Postretirement Life Insurance In Connection With SERPs [Member] |  |  |  |  |
Cash surrender value of life insurance | $ 6,000,000 |  | $ 6,000,000 |  | $ 5,900,000
Tax-Qualified Retirement Plan [Member] |  |  |  |  |
Employee Stock Ownership Plan (ESOP), Number of Committed-to-be-Released Shares per year | 10,226 |  | 10,226 |  |

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- Definition Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(17)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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- Definition Amount of contribution received by defined benefit plan from employer which increases plan assets. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-18 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-6 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition The amount reported as a liability as of the balance sheet date by the entity (the employer) of the loan made by a third-party lender directly to the ESOP. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 25 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480637/718-40-25-9 + Details
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- Definition The shares that, although not legally released, will be released by a future scheduled and committed debt service payment and will be allocated to employees for service rendered in the current accounting period. The ESOP documents typically define the period of service to which the shares relate. ESOP shares are released to compensate employees directly, to settle employer liabilities for other employee benefits, and to replace dividends on allocated shares that are used for debt service. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480489/718-40-50-1 + Details
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