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EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS (Tables) | 12 Months Ended
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Dec. 31, 2024
Notes Tables |
Schedule of funded status of the defined benefit plans | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Pension |  | Postretirement
(In Thousands) |  | 2024 | ​ | 2023 |  | 2024 | ​ | 2023
CHANGE IN BENEFIT OBLIGATION: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Benefit obligation at beginning of year | ​ | $ | 896 | ​ | $ | 946 | ​ | $ | 1,013 | ​ | $ | 935
Service cost | ​ |  | 0 | ​ |  | 0 | ​ |  | 6 | ​ |  | 54
Interest cost | ​ |  | 29 | ​ |  | 31 | ​ |  | 31 | ​ |  | 48
Plan participants' contributions | ​ |  | 0 | ​ |  | 0 | ​ |  | 118 | ​ |  | 129
Actuarial loss | ​ |  | 18 | ​ |  | 63 | ​ |  | 10 | ​ |  | 37
Gain from plan amendments | ​ | ​ | 0 | ​ | ​ | 0 | ​ | ​ | (413) | ​ | ​ | 0
Benefits paid | ​ | ​ | (5) | ​ | ​ | (5) | ​ | ​ | (179) | ​ | ​ | (190)
Settlement of plan obligation | ​ |  | 0 | ​ |  | (139) | ​ |  | 0 | ​ |  | 0
Benefit obligation at end of year | ​ | $ | 938 | ​ | $ | 896 | ​ | $ | 586 | ​ | $ | 1,013
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
CHANGE IN PLAN ASSETS: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Fair value of plan assets at beginning of year | ​ | $ | 946 | ​ | $ | 1,001 | ​ | $ | 0 | ​ | $ | 0
Actual return on plan assets | ​ |  | 36 | ​ |  | 89 | ​ |  | 0 | ​ |  | 0
Employer contribution | ​ |  | 0 | ​ |  | 0 | ​ |  | 61 | ​ |  | 61
Plan participants' contributions | ​ |  | 0 | ​ |  | 0 | ​ |  | 118 | ​ |  | 129
Benefits paid | ​ | ​ | (5) | ​ | ​ | (5) | ​ | ​ | (179) | ​ | ​ | (190)
Settlement of plan obligation | ​ |  | 0 | ​ |  | (139) | ​ |  | 0 | ​ |  | 0
Fair value of plan assets at end of year | ​ | $ | 977 | ​ | $ | 946 | ​ | $ | 0 | ​ | $ | 0
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Funded status at end of year | ​ | $ | 39 | ​ | $ | 50 | ​ | $ | (586) | ​ | $ | (1,013)
Schedule of pension plan and postretirement plan liability amounts were recognized in the consolidated balance sheets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Pension | ​ | Postretirement
(In Thousands) |  | 2024 |  | 2023 |  | 2024 |  | 2023
Accrued interest and other liabilities | ​ | ​ | 39 | ​ | $ | 50 | ​ | $ | 586 | ​ | ​ | 1,013
Summary of items not yet recognized as a component of net periodic benefit cost | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Pension | ​ | Postretirement
(In Thousands) |  | 2024 | ​ | 2023 |  | 2024 | ​ | 2023
Prior service cost | ​ | $ | 0 | ​ | $ | 0 | ​ | $ | (56) | ​ | $ | (124)
Net actuarial loss (gain) |  | ​ | 131 | ​ | ​ | 139 |  | ​ | (486) | ​ | ​ | (573)
Total | ​ | $ | 131 | ​ | $ | 139 | ​ | $ | (542) | ​ | $ | (697)
Summary of components of net periodic benefit costs from defined benefit plans | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Pension | ​ | Postretirement
(In Thousands) |  | 2024 | ​ | 2023 |  | 2022 |  | 2024 | ​ | 2023 |  | 2022
Service cost | ​ | $ | 0 | ​ | $ | 0 | ​ | $ | 0 | ​ | $ | 6 | ​ | $ | 54 | ​ | $ | 63
Interest cost |  | ​ | 29 | ​ | ​ | 31 | ​ | ​ | 22 |  | ​ | 31 | ​ | ​ | 48 | ​ | ​ | 34
Expected return on plan assets |  | ​ | (16) | ​ | ​ | (18) | ​ | ​ | (35) |  | ​ | 0 | ​ | ​ | 0 | ​ | ​ | 0
Amortization of prior service cost |  | ​ | 0 | ​ | ​ | 0 | ​ | ​ | 0 |  | ​ | (12) | ​ | ​ | (31) | ​ | ​ | (31)
Recognized net actuarial loss (gain) |  | ​ | 6 | ​ | ​ | 11 | ​ | ​ | 8 |  | ​ | (77) | ​ | ​ | (36) | ​ | ​ | (19)
Effect of curtailment | ​ | ​ | 0 | ​ | ​ | 0 | ​ | ​ | 0 | ​ | ​ | (469) | ​ | ​ | 0 | ​ | ​ | 0
Settlement of plan obligation | ​ | ​ | 0 | ​ | ​ | 21 | ​ | ​ | 0 | ​ | ​ | 0 | ​ | ​ | 0 | ​ | ​ | 0
Total net periodic benefit cost | ​ | $ | 19 | ​ | $ | 45 | ​ | $ | (5) | ​ | $ | (521) | ​ | $ | 35 | ​ | $ | 47
Schedule of weighted-average assumptions used to determine net periodic benefit cost | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Pension | ​ | Postretirement |
​ |  | 2024 |  | 2023 |  | 2022 |  | 2024 |  | 2023 |  | 2022 |
Discount rate |  | 4.80 | % | 5.05 | % | 2.60 | % | 5.00 | % | 5.25 | % | 3.00 | %
Expected return on plan assets |  | 5.00 | % | 4.22 | % | 5.00 | % | N/A |  | N/A |  | N/A | ​
Rate of compensation increase |  | N/A |  | N/A |  | N/A |  | N/A |  | N/A |  | N/A | ​
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Pension |  | Postretirement | ​
​ |  | 2024 |  | 2023 |  | 2024 |  | 2023 | ​
Discount rate |  | 5.35 | % | 4.80 | % | 5.29 | % | 5.00 | %
Rate of compensation increase |  | N/A |  | N/A |  | N/A |  | N/A | ​
Schedule of Estimated future benefit payments | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) |  | Pension |  | Postretirement
2025 | ​ | $ | 620 | ​ | $ | 68
2026 | ​ |  | 14 | ​ |  | 67
2027 | ​ |  | 9 | ​ |  | 59
2028 | ​ |  | 250 | ​ |  | 59
2029 | ​ |  | 8 | ​ |  | 54
2030-2034 | ​ |  | 38 | ​ |  | 233
Schedule of fair values of pension plan assets | ​
​ | ​ | ​ | ​ | ​ | ​
​ |  | 2024 |  | 2023 |
Mutual funds invested principally in: | ​ | ​ | ​ | ​ |
Cash and cash equivalents |  | 100 | % | 54 | %
Debt securities |  | 0 | % | 18 | %
Equity securities |  | 0 | % | 24 | %
Alternative funds |  | 0 | % | 4 | %
Total |  | 100 | % | 100 | %
Schedule of stock-based compensation expense | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) |  | 2024 | ​ | 2023 |  | 2022
Restricted stock | ​ | $ | 1,494 | ​ | $ | 1,472 | ​ | $ | 1,260
Stock options |  | ​ | 0 | ​ | ​ | 0 | ​ | ​ | 0
Total | ​ | $ | 1,494 | ​ | $ | 1,472 | ​ | $ | 1,260
Summary of non-vested restricted stock activity | ​
​ | ​ | ​ | ​ | ​ | ​
​ |  |  |  | Weighted
​ | ​ | ​ | ​ | Average
​ | ​ | Number | ​ | Grant Date
​ |  | of Shares |  | Fair Value
Outstanding, December 31, 2023 |  | 110,009 | ​ | $ | 23.44
Granted |  | 92,860 | ​ | $ | 20.69
Vested |  | (62,969) | ​ | $ | 22.97
Forfeited |  | (2,076) | ​ | $ | 23.37
Outstanding, December 31, 2024 |  | 137,824 | ​ | $ | 21.80
Summary of stock option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2024 |  | 2023 | ​ | 2022
​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​ | Weighted | ​ | ​ | ​ | Weighted
​ | ​ | ​ | ​ | Average | ​ | ​ | ​ | Average | ​ | ​ | ​ | Average
​ | ​ | ​ | ​ | Exercise | ​ | ​ | ​ | Exercise | ​ | ​ | ​ | Exercise
​ |  | Shares |  | Price |  | Shares |  | Price | ​ | Shares |  | Price
Outstanding, beginning of year |  | 646 | ​ | $ | 20.45 |  | 10,564 | ​ | $ | 20.45 |  | 24,218 | ​ | $ | 20.01
Granted |  | 0 | ​ |  | 0 |  | 0 | ​ |  | 0 |  | 0 | ​ |  | 0
Exercised |  | 0 | ​ | ​ | 0 |  | (8,288) | ​ | $ | 20.45 |  | (13,654) | ​ | $ | 19.67
Forfeited |  | 0 | ​ | ​ | 0 |  | (1,630) | ​ | $ | 20.45 |  | 0 | ​ | ​ | 0
Expired |  | (646) | ​ | $ | 20.45 |  | 0 | ​ | ​ | 0 |  | 0 | ​ | ​ | 0
Outstanding, end of year |  | 0 | ​ | $ | 0 |  | 646 | ​ | $ | 20.45 |  | 10,564 | ​ | $ | 20.45
Options exercisable at year-end |  | 0 | ​ | $ | 0 |  | 646 | ​ | $ | 20.45 |  | 10,564 | ​ | $ | 20.45
Weighted-average fair value of options forfeited |  | ​ | ​ | $ | N/A |  | ​ | ​ | $ | 5.50 |  | ​ | ​ | ​ | N/A
Restricted Stock |
Notes Tables |
Summary of awarded shares of restricted stock under the Stock Incentive Plan, | ​
​ | ​ | ​ | ​ | ​
​ |  | 2024 |  | 2023
Time-based awards to independent directors | ​ | 10,000 | ​ | 11,000
Time-based awards to employees |  | 63,514 |  | 31,684
Performance-based awards to employees |  | 19,346 |  | 11,104
Total |  | 92,860 |  | 53,788

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