Note 10 - Retirement Plans (Tables)
|
12 Months Ended |
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 |
|
|