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STOCK-BASED COMPENSATION (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of activity related to stock options | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ |  | ​ | ​ |  | Weighted- |  | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Average | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted- | ​ | Remaining | ​ | Aggregate
​ | ​ | Number of | ​ | Average Exercise | ​ | Contractual | ​ | Intrinsic
(Dollars in thousands except share and per share amounts) |  | Options |  | Price |  | Years |  | Value
Options outstanding at January 1, 2023 | ​ | 92,137 | ​ | $ | 35.39 | ​ | 6.2 | ​ | ​ | —
Options exercised | ​ | — | ​ |  | — | ​ | ​ | ​ | ​ | ​
Options forfeited | ​ | (65,142) | ​ |  | 35.38 | ​ | ​ | ​ | ​ | ​
Options outstanding at December 31, 2023 |  | 26,995 | ​ | $ | 35.39 |  | 5.2 | ​ | $ | —
Options vested and exercisable at December 31, 2023 |  | 26,995 | ​ | $ | 35.39 |  | 5.2 | ​ | $ | —
Schedule of information related to stock option plan | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
(In thousands) | ​ | 2023 |  | 2022 |  | 2021
Cash received for option exercise cost | ​ | $ | — | ​ | $ | — | ​ | $ | 431
Income tax (expense) benefit recognized on stock option exercises | ​ |  | — | ​ |  | — | ​ |  | (15)
Intrinsic value of options exercised | ​ |  | — | ​ |  | — | ​ |  | 171
Schedule of exercise prices and weighted-average remaining contractual lives of both outstanding and vested options | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Outstanding Options | Vested Options
​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​ | Weighted
​ | ​ | ​ | ​ | Average | ​ | ​ | ​ | Average
​ | ​ | ​ | ​ | Contractual | ​ | ​ | ​ | Contractual
​ | ​ | ​ | ​ | Years | ​ | ​ | ​ | Years
​ |  | Amount |  | Remaining |  | Amount |  | Remaining
Exercise Prices: |  |  |  |  |  |  |  |
$34.87 |  | 10,061 |  | 6.1 |  | 10,061 |  | 6.1
$35.35 |  | 9,802 |  | 5.1 |  | 9,802 |  | 5.1
$36.19 |  | 7,132 |  | 4.1 |  | 7,132 |  | 4.1
Total |  | 26,995 |  | 5.2 |  | 26,995 |  | 5.2
Schedule of activity related to restricted stock awards | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ |  | Weighted-
​ | ​ | ​ | ​ | Average
​ | ​ | Number of | ​ | Grant-Date
​ |  | Shares |  | Fair Value
Unvested allocated shares outstanding at January 1, 2023 | ​ | 350,758 | ​ | $ | 28.63
Shares granted |  | 220,750 | ​ |  | 25.47
Shares vested | ​ | (134,648) | ​ | ​ | 29.37
Shares forfeited |  | (80,065) | ​ |  | 26.45
Unvested allocated shares outstanding at December 31, 2023 |  | 356,795 | ​ | $ | 26.88
Schedule of information related to restricted stock award plan | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
(In thousands) | ​ | ​ | 2023 |  | ​ | 2022 |  | ​ | 2021
Compensation expense recognized | ​ | $ | 4,003 | ​ | $ | 3,516 | ​ | $ | 5,253
Income tax (expense) benefit recognized on vesting of RSAs | ​ |  | (188) | ​ |  | (10) | ​ |  | 27
Performance Shares | Long Term Incentive Award Program |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of activity related to performance based equity awards | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ |  | Weighted-
​ | ​ | ​ | ​ | Average
​ | ​ | Number of | ​ | Grant-Date
​ |  | Shares |  | Fair Value
Maximum aggregate share payout at January 1, 2023 | ​ | 95,831 | ​ | $ | 30.35
Shares granted |  | 195,066 | ​ |  | 17.69
Shares forfeited | ​ | (60,987) | ​ | ​ | 25.21
Maximum aggregate share payout at December 31, 2023 |  | 229,910 | ​ | $ | 20.97
Minimum aggregate share payout |  | — | ​ | ​ | —
Expected aggregate share payout |  | 210,820 | ​ | $ | 20.21
Schedule of information related to performance based share award plan | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
(In thousands) | ​ | 2023 |  | 2022 |  | 2021
Compensation (benefit) expense recognized | ​ | $ | 635 | ​ | $ | 760 | ​ | $ | 154
Income tax expense recognized on vesting of PSAs | ​ |  | — | ​ |  | 193 | ​ |  | —

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