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v3.26.1

Note 10 - Retirement Plans (Tables) | 12 Months Ended
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Mar. 31, 2026
Notes Tables |
Schedule of Changes in Projected Benefit Obligations [Table Text Block] |
|  | Fiscal Year: |
|  | 2026 |  |  | 2025 |
Change in benefit obligation |  |  |  |  |  |  |  |
Benefit obligation at beginning of year |  | $ | 217,388 |  |  | $ | 236,507 |
Service cost (excluding expenses) |  |  | 3,997 |  |  |  | 4,905 |
Interest cost |  |  | 11,105 |  |  |  | 11,967 |
Actuarial gain |  |  | (6,645 | ) |  |  | (14,616 | )
Benefit payments |  |  | (10,926 | ) |  |  | (21,375 | )
Benefit obligation at end of year |  | $ | 214,919 |  |  | $ | 217,388 |
Change in plan assets |  |  |  |  |  |  |  |
Fair value of plan assets at beginning of year |  | $ | 293,121 |  |  | $ | 288,949 |
Actual return on plan assets |  |  | 42,019 |  |  |  | 26,901 |
Benefit payments and expenses |  |  | (12,079 | ) |  |  | (22,729 | )
Fair value of plan assets at end of year |  | $ | 323,061 |  |  | $ | 293,121 |
Funded status |  | $ | 108,142 |  |  | $ | 75,733 |
Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block] |
|  | Fiscal Year: |
|  | 2026 |  |  | 2025 |  |  | 2024 |
Amounts Recognized in Accumulated Other Comprehensive Pre-Tax Income (Loss) |  |  |  |  |  |  |  |  |  |  |  |
Prior service cost |  | $ | - |  |  | $ | (1 | ) |  | $ | (9 | )
Net gain (loss) |  |  | 16,696 |  |  |  | (11,574 | ) |  |  | (34,883 | )
Accumulated other comprehensive pre-tax income (loss) |  | $ | 16,696 |  |  | $ | (11,575 | ) |  | $ | (34,892 | )
Schedule of Defined Benefit Plans Disclosures [Table Text Block] |
|  | Fiscal Year: |
|  | 2026 |  |  | 2025 |  |  | 2024 |
Service cost including administrative expenses |  | $ | 4,682 |  |  | $ | 5,805 |  |  | $ | 6,405 |
Interest cost |  |  | 11,105 |  |  |  | 11,967 |  |  |  | 11,388 |
Expected return on plan assets |  |  | (19,926 | ) |  |  | (18,504 | ) |  |  | (17,725 | )
Amortization of net loss |  |  | - |  |  |  | 750 |  |  |  | 220 |
Amortization of prior service cost |  |  | 1 |  |  |  | 8 |  |  |  | 66 |
Net periodic benefit (income) cost |  | $ | (4,138 | ) |  | $ | 26 |  |  | $ | 354 |
Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] |
|  | Fiscal Year: |
|  | 2026 |  |  | 2025 |  |  | 2024 |
Other Changes in Plan Assets and Benefit Obligation Recognized in Other Comprehensive Income |  |  |  |  |  |  |  |  |  |  |  |
Net actuarial (gain) loss |  | $ | (28,270 | ) |  | $ | (22,559 | ) |  | $ | 6,792 |
Amortization of: |  |  |  |  |  |  |  |  |  |  |  |
Prior service cost |  |  | (1 | ) |  |  | (8 | ) |  |  | (65 | )
Actuarial loss |  |  | - |  |  |  | (750 | ) |  |  | (220 | )
Total recognized in other comprehensive income |  | $ | (28,271 | ) |  | $ | (23,317 | ) |  | $ | 6,507 |
Defined Benefit Plan, Assumptions [Table Text Block] |
|  |  |  |  |  | Fiscal Year: |  |  |  |  |
|  | 2026 |  |  | 2025 |  |  | 2024 |
Weighted Average Assumptions for Balance Sheet Liability at End of Year: |  |  |  |  |  |  |  |  |  |  |  |
Discount rate - projected benefit obligation |  |  | 5.93 | % |  |  | 5.63 | % |  |  | 5.31 | %
Rate of compensation increase |  |  | 3.00 | % |  |  | 3.00 | % |  |  | 3.00 | %
Mortality table |  | Pri-2012 Blue Collar Generational Table Improvement Scale MP-2021 |  |  | Pri-2012 Blue Collar Generational Table Improvement Scale MP-2021 |  |  | Pri-2012 Blue Collar Generational Table Improvement Scale MP-2021 |
Schedule of Expected Benefit Payments [Table Text Block] |
|  | Fiscal Year: |
|  | 2026 |  |  | 2025 |  |  | 2024 |
Weighted Average Assumptions for Benefit Cost at Beginning of Year: |  |  |  |  |  |  |  |  |  |  |  |
Discount rate - benefit obligations |  |  | 5.63 | % |  |  | 5.31 | % |  |  | 5.04 | %
Discount rate - interest cost |  |  | 5.24 | % |  |  | 5.19 | % |  |  | 4.90 | %
Discount rate - service cost |  |  | 5.83 | % |  |  | 5.40 | % |  |  | 5.16 | %
Expected return on plan assets |  |  | 6.95 | % |  |  | 6.55 | % |  |  | 6.15 | %
Rate of compensation increase |  |  | 3.00 | % |  |  | 3.00 | % |  |  | 3.00 | %
2027 | $ | 12,449 |
2028 |  | 13,061 |
2029 |  | 13,723 |
2030 |  | 14,219 |
2031 |  | 14,623 |
2032-2036 |  | 78,056 |
Schedule of Allocation of Plan Assets [Table Text Block] |
|  | Target Allocation for: |  |  | Percentage of Plan Assets as of: |
|  | Fiscal Year 2027 |  |  | March 31, 2026 |  |  | March 31, 2025 |
Equity securities |  |  | 31 | % |  |  | 31 | % |  |  | 24 | %
Debt securities |  |  | 63 | % |  |  | 64 | % |  |  | 72 | %
Real assets |  |  | 3 | % |  |  | 2 | % |  |  | 2 | %
Cash |  |  | 1 | % |  |  | 1 | % |  |  | 1 | %
Other |  |  | 2 | % |  |  | 2 | % |  |  | 1 | %
Total |  |  | 100 | % |  |  | 100 | % |  |  | 100 | %
Defined Benefit Plan, Plan Assets, Category [Table Text Block] |
|  | As of March 31, 2026 |
|  | Level 1 |  |  | Level 2 and Level 3 |  |  | Subtotal |  |  | Measured at NAV (1) |  |  | Total |
Equity securities |  | $ | 70,860 |  |  | $ | - |  |  | $ | 70,860 |  |  | $ | - |  |  | $ | 70,860 |
Held in common/collective trusts: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity securities |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 28,859 |  |  |  | 28,859 |
Real assets |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 7,505 |  |  |  | 7,505 |
Debt securities |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 207,304 |  |  |  | 207,304 |
Cash/short-term investments (2) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 3,457 |  |  |  | 3,457 |
Other investments |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 5,076 |  |  |  | 5,076 |
Fair value of plan assets |  | $ | 70,860 |  |  | $ | - |  |  | $ | 70,860 |  |  | $ | 252,201 |  |  | $ | 323,061 |
|  | As of March 31, 2025 |
|  | Level 1 |  |  | Level 2 and Level 3 |  |  | Subtotal |  |  | Measured at NAV (1) |  |  | Total |
Equity securities |  | $ | 42,767 |  |  | $ | - |  |  | $ | 42,767 |  |  | $ | - |  |  | $ | 42,767 |
Held in common/collective trusts: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity securities |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 26,903 |  |  |  | 26,903 |
Real assets |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 4,451 |  |  |  | 4,451 |
Debt securities |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 212,162 |  |  |  | 212,162 |
Cash/short-term investments (2) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 3,485 |  |  |  | 3,485 |
Other investments |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 3,353 |  |  |  | 3,353 |
Fair value of plan assets |  | $ | 42,767 |  |  | $ | - |  |  | $ | 42,767 |  |  | $ | 250,354 |  |  | $ | 293,121 |

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