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Note M - Pension and Other Postretirement Benefit Plans (Tables) | 12 Months Ended
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Jun. 30, 2021
Notes Tables |
Schedule of Net Funded Status [Table Text Block] |
|  |  |  |  |  |  |  |  |  | Other |
|  | Pension |  |  | Postretirement |
|  | Benefits |  |  | Benefits |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Change in benefit obligation: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Benefit obligation, beginning of year |  | $ | 105,520 |  |  | $ | 107,322 |  |  | $ | 7,059 |  |  | $ | 7,451 |
Service cost |  |  | 608 |  |  |  | 653 |  |  |  | 16 |  |  |  | 17 |
Interest cost |  |  | 2,516 |  |  |  | 3,305 |  |  |  | 154 |  |  |  | 219 |
Prior service cost |  |  | 65 |  |  |  | - |  |  |  | - |  |  |  | - |
Actuarial (gain) loss |  |  | (1,577 | ) |  |  | 3,161 |  |  |  | (395 | ) |  |  | 211 |
Contributions by plan participants |  |  | 114 |  |  |  | 93 |  |  |  | 269 |  |  |  | 352 |
Benefits paid |  |  | (8,546 | ) |  |  | (9,014 | ) |  |  | (1,001 | ) |  |  | (1,191 | )
Benefit obligation, end of year |  | $ | 98,700 |  |  | $ | 105,520 |  |  | $ | 6,102 |  |  | $ | 7,059 |
Change in plan assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of assets, beginning of year |  | $ | 83,284 |  |  | $ | 87,291 |  |  | $ | - |  |  | $ | - |
Actual return on plan assets |  |  | 15,325 |  |  |  | 3,541 |  |  |  | - |  |  |  | - |
Employer contribution |  |  | 2,253 |  |  |  | 1,373 |  |  |  | 732 |  |  |  | 839 |
Contributions by plan participants |  |  | 114 |  |  |  | 93 |  |  |  | 269 |  |  |  | 352 |
Benefits paid |  |  | (8,546 | ) |  |  | (9,014 | ) |  |  | (1,001 | ) |  |  | (1,191 | )
Fair value of assets, end of year |  | $ | 92,430 |  |  | $ | 83,284 |  |  | $ | - |  |  | $ | - |
Funded status |  | $ | (6,270 | ) |  | $ | (22,236 | ) |  | $ | (6,102 | ) |  | $ | (7,059 | )
Amounts recognized in the balance sheet consist of: |  |  |  |  |  |  |  |  |  |  |  |  |
Other assets - noncurrent |  | $ | 60 |  |  | $ | - |  |  | $ | - |  |  | $ | - |
Accrued liabilities - current |  |  | (423 | ) |  |  | (276 | ) |  |  | (833 | ) |  |  | (1,081 | )
Accrued retirement benefits - noncurrent |  |  | (5,907 | ) |  |  | (21,960 | ) |  |  | (5,269 | ) |  |  | (5,978 | )
Net amount recognized |  | $ | (6,270 | ) |  | $ | (22,236 | ) |  | $ | (6,102 | ) |  | $ | (7,059 | )
Amounts recognized in accumulated other comprehensive loss consist of (net of tax): |  |  |  |  |  |  |  |  |
Net transition obligation |  | $ | 133 |  |  | $ | 158 |  |  | $ | - |  |  | $ | - |
Prior service cost |  |  | 94 |  |  |  | 104 |  |  |  | (487 | ) |  |  | (697 | )
Actuarial net loss |  |  | 31,563 |  |  |  | 43,548 |  |  |  | 160 |  |  |  | 463 |
Net amount recognized |  | $ | 31,790 |  |  | $ | 43,810 |  |  | $ | (327 | ) |  | $ | (234 | )
Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block] |
|  |  |  |  |  | Other |
|  | Pension |  |  | Postretirement |
|  | Benefits |  |  | Benefits |
Net transition obligation |  | $ | 37 |  |  | $ | - |
Prior service cost |  |  | 44 |  |  |  | (275 | )
Actuarial net loss |  |  | 2,254 |  |  |  | - |
Net amount to be recognized |  | $ | 2,335 |  |  | $ | (275 | )
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Table Text Block] |
|  | June 30 |
|  | 2021 |  |  | 2020 |
Projected and accumulated benefit obligation |  | $ | 53,780 |  |  | $ | 105,520 |
Fair value of plan assets |  |  | 47,450 |  |  |  | 83,284 |
Schedule of Net Benefit Costs [Table Text Block] |
|  | Pension Benefits |
|  | 2021 |  |  | 2020 |
Service cost |  | $ | 615 |  |  | $ | 648 |
Interest cost |  |  | 2,516 |  |  |  | 3,304 |
Prior service cost |  |  | 65 |  |  |  | - |
Expected return on plan assets |  |  | (4,552 | ) |  |  | (4,894 | )
Amortization of transition obligation |  |  | 40 |  |  |  | 35 |
Amortization of prior service cost |  |  | 47 |  |  |  | 45 |
Amortization of actuarial net loss |  |  | 3,246 |  |  |  | 2,982 |
Net periodic benefit cost |  | $ | 1,977 |  |  | $ | 2,120 |
|  | Other Postretirement Benefits |
|  | 2021 |  |  | 2020 |
Service cost |  | $ | 16 |  |  | $ | 17 |
Interest cost |  |  | 154 |  |  |  | 219 |
Amortization of prior service cost |  |  | (274 | ) |  |  | (274 | )
Net periodic benefit cost |  | $ | (104 | ) |  | $ | (38 | )
Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] |
|  |  |  |  |  | Other |
|  |  |  |  |  | Postretirement |
|  | Pension |  |  | Benefits |
Net loss |  | $ | (12,464 | ) |  | $ | (397 | )
Amortization of transition asset |  |  | (40 | ) |  |  | - |
Amortization of prior service (cost) benefit |  |  | (43 | ) |  |  | 275 |
Amortization of net loss |  |  | (3,246 | ) |  |  | - |
Total recognized in other comprehensive income |  |  | (15,793 | ) |  |  | (122 | )
Net periodic benefit cost (benefit) |  |  | 1,977 |  |  |  | (104 | )
Total recognized in net periodic benefit cost and other comprehensive income |  | $ | (13,816 | ) |  | $ | (226 | )
|  |  |  |  |  | Other |
|  |  |  |  |  | Postretirement |
|  | Pension |  |  | Benefits |
Net loss |  | $ | 4,770 |  |  | $ | 211 |
Amortization of transition asset |  |  | (35 | ) |  |  | - |
Amortization of prior service (cost) benefit |  |  | (45 | ) |  |  | 275 |
Amortization of net loss |  |  | (2,978 | ) |  |  | - |
Total recognized in other comprehensive income |  |  | 1,712 |  |  |  | 486 |
Net periodic benefit cost (benefit) |  |  | 2,120 |  |  |  | (38 | )
Total recognized in net periodic benefit cost and other comprehensive income |  | $ | 3,832 |  |  | $ | 448 |
Defined Benefit Plan, Assumptions [Table Text Block] |
|  |  |  |  |  |  |  |  |  | Other |
|  | Pension Benefits |  |  | Postretirement Benefits |
Weighted average assumptions used to determine benefit obligations at June 30 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Discount rate |  |  | 2.63 | % |  |  | 2.49 | % |  |  | 2.47 | % |  |  | 2.37 | %
Expected return on plan assets |  |  | 5.69 | % |  |  | 5.89 | % |  |  |  |  |  |  |  |
|  |  |  |  |  |  |  |  |  | Other |
|  | Pension Benefits |  |  | Postretirement Benefits |
Weighted average assumptions used to determine net periodic benefit costs for years ended June 30 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Discount rate |  |  | 2.49 | % |  |  | 3.22 | % |  |  | 2.37 | % |  |  | 3.15 | %
Expected return on plan assets |  |  | 5.89 | % |  |  | 6.04 | % |  |  |  |  |  |  |  |
Schedule of Plan Weighted Average Assets Allocations [Table Text Block] |
|  | Target |  |  | June 30 |
Asset Category |  | Allocation |  |  | 2021 |  |  | 2020 |
Equity securities |  |  | 51 | % |  |  | 53 | % |  |  | 47 | %
Debt securities |  |  | 40 | % |  |  | 38 | % |  |  | 44 | %
Real estate |  |  | 9 | % |  |  | 9 | % |  |  | 9 | %
|  |  | 100 | % |  |  | 100 | % |  |  | 100 | %
Schedule of Allocation of Plan Assets [Table Text Block] |
|  | Total |  |  | Level I |  |  | Level II |  |  | Level III |
Cash and cash equivalents |  | $ | 1,043 |  |  | $ | 1,043 |  |  | $ | - |  |  | $ | - |
Equity securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company common stock (a) |  |  | 1,398 |  |  |  | 1,398 |  |  |  | - |  |  |  | - |
Common stock (a) |  |  | 18,201 |  |  |  | 18,201 |  |  |  | - |  |  |  | - |
Mutual funds (b) |  |  | 9,366 |  |  |  | 9,366 |  |  |  | - |  |  |  | - |
Annuity contracts (c) |  |  | 6,646 |  |  |  | - |  |  |  | - |  |  |  | 6,646 |
Total |  | $ | 36,654 |  |  | $ | 30,008 |  |  | $ | - |  |  | $ | 6,646 |
Investments Measured at Net Asset Value (d) |  |  | 55,776 |  |  |  |  |  |  |  |  |  |  |  |  |
Total |  | $ | 92,430 |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Total |  |  | Level I |  |  | Level II |  |  | Level III |
Cash and cash equivalents |  | $ | 920 |  |  | $ | 920 |  |  | $ | - |  |  | $ | - |
Equity securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company common stock (a) |  |  | 544 |  |  |  | 544 |  |  |  | - |  |  |  | - |
Common stock (a) |  |  | 14,551 |  |  |  | 14,551 |  |  |  | - |  |  |  | - |
Mutual funds (b) |  |  | 7,916 |  |  |  | 7,916 |  |  |  | - |  |  |  | - |
Annuity contracts (c) |  |  | 6,095 |  |  |  | - |  |  |  | - |  |  |  | 6,095 |
Total |  | $ | 30,026 |  |  | $ | 23,931 |  |  | $ | - |  |  | $ | 6,095 |
Investments Measured at Net Asset Value (d) |  |  | 53,258 |  |  |  |  |  |  |  |  |  |  |  |  |
Total |  | $ | 83,284 |  |  |  |  |  |  |  |  |  |  |  |  |
|  | 2021 |  |  | 2020 |
Fixed income funds |  | $ | 31,627 |  |  | $ | 33,032 |
International equity securities |  |  | 4,282 |  |  |  | 2,840 |
Real estate |  |  | 7,747 |  |  |  | 7,186 |
Hedged equity mutual funds |  |  | 12,120 |  |  |  | 10,200 |
Total |  | $ | 55,776 |  |  | $ | 53,258 |
Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block] |
|  | 2021 |  |  | 2020 |
Beginning balance |  | $ | 6,095 |  |  | $ | 6,171 |
Actual return on plan assets: |  |  |  |  |  |  |  |
Relating to assets still held at reporting date |  |  | 600 |  |  |  | 75 |
Purchases, sales and settlements, net |  |  | (49 | ) |  |  | (151 | )
Ending balance |  | $ | 6,646 |  |  | $ | 6,095 |
Schedule of Expected Benefit Payments [Table Text Block] |
|  |  |  |  |  | Other |
|  | Pension |  |  | Postretirement |
|  | Benefits |  |  | Benefits |
2022 |  | $ | 8,535 |  |  | $ | 843 |
2023 |  |  | 7,794 |  |  |  | 769 |
2024 |  |  | 7,433 |  |  |  | 693 |
2025 |  |  | 7,095 |  |  |  | 608 |
2026 |  |  | 6,865 |  |  |  | 544 |
Years 2027 - 2031 |  |  | 31,435 |  |  |  | 2,042 |

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