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Employee Benefit Plans (Table Text Block) | 12 Months Ended
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Mar. 31, 2025
Table Text Block [Abstract] |
Summary Of Financing Arrangements for Leveraged ESOP Debt |
|  | Years Ended March 31, |
|  | 2025 |  |  | 2024 |
|  | (In thousands) |
Allocated shares - Voting Common Stock |  |  | 733 |  |  |  | 777 |
Allocated shares - Non-Voting Common Stock |  |  | 7,845 |  |  |  | 7,778 |
Shares Held by the ESOP Plan | The components of net periodic post retirement benefit cost were as follows:
|  | Years Ended March 31, |
|  | 2025 |  |  | 2024 |  |  | 2023 |
|  | (In thousands) |
Service cost for benefits earned during the period |  | $ | 982 |  | $ |  | 1,188 |  | $ |  | 1,326 |
Other components of net periodic benefit costs: |  |  |  |  |  |  |  |  |
Interest cost on accumulated postretirement benefit |  |  | 1,499 |  |  |  | 1,469 |  |  |  | 1,148 |
Other components |  |  | (11 | ) |  |  | (11 | ) |  |  | 68 |
Total other components of net periodic benefit costs |  |  | 1,488 |  |  |  | 1,458 |  |  |  | 1,216 |
Net periodic postretirement benefit cost |  | $ | 2,470 |  | $ |  | 2,646 |  | $ |  | 2,542 |
Components of Net Periodic Post Retirement Benefit Cost |
|  | Years Ended March 31, |
|  | 2025 |  |  | 2024 |
|  | (In thousands) |
Beginning of year | $ |  | 28,326 |  | $ |  | 28,770 |
Service cost for benefits earned during the period |  |  | 982 |  |  |  | 1,188 |
Interest cost on accumulated post retirement benefit |  |  | 1,499 |  |  |  | 1,469 |
Net benefit payments and expense |  |  | (1,327 | ) |  |  | (1,240 | )
Actuarial gain |  |  | (496 | ) |  |  | (1,861 | )
Prior service credit |  |  | (1,579 | ) |  |  | — |
Accumulated postretirement benefit obligation |  |  | 27,405 |  |  |  | 28,326 |
Current liabilities |  |  | 1,790 |  |  |  | 1,741 |
Non-current liabilities |  |  | 25,614 |  |  |  | 26,585 |
Total post retirement benefit liability recognized in statement of financial position |  |  | 27,404 |  |  |  | 28,326 |
Components included in accumulated other comprehensive income (loss): |  |  |  |  |  |
Unrecognized net loss |  |  | 3,449 |  |  |  | 1,385 |
Cumulative net periodic benefit cost (in excess of employer contribution) | $ |  | 30,853 |  | $ |  | 29,711 |
Components of Post Retirement Benefit Liabilities |
|  | Years Ended March 31,
|  | 2025 | 2024 | 2023
|  | (In percentages) |  |
Accumulated postretirement benefit obligation |  |  | 5.45 |  | % |  | 5.34 |  | % |  | 5.08 |  | %
Discount Rate Assumptions for Accumulated Postretirement Benefit Obligations |
|  | Future Net Benefit Payments |
|  | (In thousands) |
Year-ended: |  |  |
2026 | $ |  | 1,789 |
2027 |  |  | 2,010 |
2028 |  |  | 2,211 |
2029 |  |  | 2,387 |
2030 |  |  | 2,596 |
2031 Through 2035 |  |  | 13,158 |
Total | $ |  | 24,151 |

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- Definition Tabular disclosure of assumption used to determine benefit obligation and net periodic benefit cost of defined benefit plan. Includes, but is not limited to, discount rate, rate of compensation increase, expected long-term rate of return on plan assets and interest crediting rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Tabular disclosure of the change in the accumulated postemployment benefit obligation from the beginning to the end of the period, showing separately, if applicable, the effects of the following: service cost, interest cost, contributions by plan participants, actuarial gains and losses, foreign currency exchange rate changes, benefits paid, plan amendments, business combinations, divestitures, curtailments, settlements, and special and contractual termination benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (a) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Tabular disclosure of the details pertaining to each employee stock ownership plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480489/718-40-50-1 + Details
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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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