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EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Schedule of funded status of the defined benefit plans | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Pension |  | Postretirement
(In Thousands) |  | 2020 |  | 2019 |  | 2020 |  | 2019
CHANGE IN BENEFIT OBLIGATION: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | ​
Benefit obligation at beginning of year | ​ | $ | 976 | ​ | $ | 870 | ​ | $ | 1,326 | ​ | $ | 1,349
Service cost | ​ |  | 0 | ​ |  | 0 | ​ |  | 46 | ​ |  | 33
Interest cost | ​ |  | 23 | ​ |  | 28 | ​ |  | 39 | ​ |  | 50
Plan participants' contributions | ​ |  | 0 | ​ |  | 0 | ​ |  | 185 | ​ |  | 184
Actuarial loss (gain) | ​ |  | 108 | ​ |  | 91 | ​ |  | 11 | ​ |  | (63)
Benefits paid | ​ |  | (6) | ​ |  | (13) | ​ |  | (260) | ​ |  | (227)
Benefit obligation at end of year | ​ | $ | 1,101 | ​ | $ | 976 | ​ | $ | 1,347 | ​ | $ | 1,326
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
CHANGE IN PLAN ASSETS: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Fair value of plan assets at beginning of year | ​ | $ | 971 | ​ | $ | 847 | ​ | $ | 0 | ​ | $ | 0
Actual return on plan assets | ​ |  | 97 | ​ |  | 137 | ​ |  | 0 | ​ |  | 0
Employer contribution | ​ |  | 0 | ​ |  | 0 | ​ |  | 75 | ​ |  | 43
Plan participants' contributions | ​ |  | 0 | ​ |  | 0 | ​ |  | 185 | ​ |  | 184
Benefits paid | ​ |  | (6) | ​ |  | (13) | ​ |  | (260) | ​ |  | (227)
Fair value of plan assets at end of year | ​ | $ | 1,062 | ​ | $ | 971 | ​ | $ | 0 | ​ | $ | 0
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Funded status at end of year | ​ | $ | (39) | ​ | $ | (5) | ​ | $ | (1,347) | ​ | $ | (1,326)
Schedule of pension plan and postretirement plan liability amounts were recognized in the consolidated balance sheets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Pension | ​ | Postretirement
(In Thousands) |  | 2020 |  | 2019 |  | 2020 |  | 2019
Accrued interest and other liabilities | ​ | $ | 39 | ​ | $ | 5 | ​ | $ | 1,347 | ​ | $ | 1,326
Summary of items not yet recognized as a component of net periodic benefit cost | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Pension | ​ | Postretirement
(In Thousands) |  | 2020 |  | 2019 |  | 2020 |  | 2019
Prior service cost | ​ | $ | 0 | ​ | $ | 0 | ​ | $ | (217) | ​ | $ | (248)
Net actuarial loss (gain) |  | ​ | 277 |  | ​ | 255 |  | ​ | (211) |  | ​ | (236)
Total | ​ | $ | 277 | ​ | $ | 255 | ​ | $ | (428) | ​ | $ | (484)
Summary of components of net periodic benefit costs from defined benefit plans | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Pension | ​ | Postretirement
(In Thousands) |  | 2020 |  | 2019 |  | 2020 |  | 2019
Service cost | ​ | $ | 0 | ​ | $ | 0 | ​ | $ | 46 | ​ | $ | 33
Interest cost |  | ​ | 23 |  | ​ | 28 |  | ​ | 39 |  | ​ | 50
Expected return on plan assets |  | ​ | (27) |  | ​ | (22) |  | ​ | 0 |  | ​ | 0
Amortization of prior service cost |  | ​ | 0 |  | ​ | 0 |  | ​ | (31) |  | ​ | (31)
Recognized net actuarial loss (gain) |  | ​ | 16 |  | ​ | 20 |  | ​ | (14) |  | ​ | (21)
Total net periodic benefit cost | ​ | $ | 12 | ​ | $ | 26 | ​ | $ | 40 | ​ | $ | 31
Schedule of weighted-average assumptions used to determine net periodic benefit cost | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Pension | ​ | Postretirement |
​ |  | 2020 |  | 2019 |  | 2020 |  | 2019 |
Citizens Trust Company Retirement Plan and postretirement plan: | ​ |  | ​ |  | ​ |  | ​ |  |
Discount rate |  | 3.10 | % | 4.10 | % | 3.25 | % | 4.50 | %
Expected return on plan assets |  | 4.99 | % | 4.68 | % | N/A |  | N/A | ​
Rate of compensation increase |  | N/A |  | N/A |  | N/A |  | N/A | ​
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Pension |  | Postretirement | ​
​ |  | 2020 |  | 2019 |  | 2020 |  | 2019 | ​
Discount rate |  | 2.30 | % | 3.10 | % | 2.50 | % | 3.25 | %
Rate of compensation increase |  | N/A |  | N/A |  | N/A |  | N/A | ​
Schedule of Estimated future benefit payments | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) |  | Pension |  | Postretirement
2021 | ​ | $ | 499 | ​ | $ | 79
2022 | ​ |  | 8 | ​ |  | 85
2023 | ​ |  | 192 | ​ |  | 77
2024 | ​ |  | 8 | ​ |  | 83
2025 | ​ |  | 8 | ​ |  | 83
2026-2030 | ​ |  | 367 | ​ |  | 407
Schedule of fair values of pension plan assets | ​
​ | ​ | ​ | ​ | ​ | ​
​ |  | 2020 |  | 2019 |
Mutual funds invested principally in: | ​ | ​ | ​ | ​ |
Cash and cash equivalents |  | 2 | % | 3 | %
Debt securities |  | 36 | % | 38 | %
Equity securities |  | 51 | % | 49 | %
Alternative funds |  | 11 | % | 10 | %
Total |  | 100 | % | 100 | %
Schedule of stock-based compensation expense | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) |  | 2020 |  | 2019
Restricted stock | ​ | $ | 1,050 | ​ | $ | 798
Stock options |  | ​ | 0 |  | ​ | 0
Total | ​ | $ | 1,050 | ​ | $ | 798
Summary of non-vested restricted stock activity | ​
​ | ​ | ​ | ​ | ​ | ​
​ |  |  |  | Weighted
​ | ​ | ​ | ​ | Average
​ | ​ | Number | ​ | Grant Date
​ |  | of Shares |  | Fair Value
Outstanding, December 31, 2019 |  | 68,200 | ​ | $ | 24.53
Granted |  | 70,940 | ​ | $ | 23.18
Vested |  | (31,908) | ​ | $ | 24.97
Forfeited |  | (5,290) | ​ | $ | 25.09
Outstanding, December 31, 2020 |  | 101,942 | ​ | $ | 23.42
Summary of stock option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2020 |  | 2019
​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​ | Weighted
​ | ​ | ​ | ​ | Average | ​ | ​ | ​ | Average
​ | ​ | ​ | ​ | Exercise | ​ | ​ | ​ | Exercise
​ |  | Shares |  | Price |  | Shares |  | Price
Outstanding, beginning of year |  | 75,897 | ​ | $ | 18.69 |  | 115,714 | ​ | $ | 18.49
Granted |  | 0 | ​ |  | ​ |  | 0 | ​ |  |
Exercised |  | (17,222) | ​ | $ | 18.25 |  | (31,304) | ​ | $ | 17.65
Forfeited |  | (1,564) | ​ | $ | 15.06 |  | 0 | ​ |  |
Expired |  | 0 | ​ | ​ | ​ |  | (8,513) | ​ | $ | 19.88
Outstanding, end of year |  | 57,111 | ​ | $ | 18.92 |  | 75,897 | ​ | $ | 18.69
Options exercisable at year-end |  | 57,111 | ​ | $ | 18.92 |  | 75,897 | ​ | $ | 18.69
Weighted-average fair value of options forfeited |  | ​ | ​ | $ | 4.26 |  |  | ​ |  | N/A
Restricted Stock |
Notes Tables |
Summary of awarded shares of restricted stock under the Stock Incentive Plan, | ​
​ | ​ | ​ | ​ | ​
​ |  | 2020 |  | 2019
Time-based awards to independent directors | ​ | 7,580 | ​ | 7,620
Time-based awards to employees |  | 45,457 |  | 26,827
Performance-based awards to employees |  | 17,903 |  | 13,690
Total |  | 70,940 |  | 48,137

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