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SECURITIES (Tables) | 12 Months Ended
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Dec. 31, 2023
SECURITIES |
Schedule of amortized cost and fair value of available-for-sale debt securities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) |  | December 31, 2023
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Unrealized | ​ | Unrealized | ​ | ​ | ​
​ |  | Amortized |  | Holding |  | Holding |  | Fair
​ |  | Cost |  | Gains |  | Losses |  | Value
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Obligations of the U.S. Treasury | ​ | $ | 12,325 | ​ | $ | 0 | ​ | $ | (1,035) | ​ | $ | 11,290
Obligations of U.S. Government agencies | ​ | ​ | 11,119 | ​ | ​ | 0 | ​ | ​ | (1,173) | ​ | ​ | 9,946
Bank holding company debt securities | ​ | ​ | 28,952 | ​ | ​ | 0 | ​ | ​ | (5,452) | ​ | ​ | 23,500
Obligations of states and political subdivisions: | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  |
Tax-exempt | ​ |  | 113,464 | ​ | ​ | 311 | ​ |  | (9,576) | ​ |  | 104,199
Taxable | ​ |  | 58,720 | ​ |  | 0 | ​ |  | (8,609) | ​ |  | 50,111
Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies: | ​ |  | ​ | ​ |  |  | ​ |  | ​ | ​ |  |
Residential pass-through securities | ​ |  | 105,549 | ​ |  | 40 | ​ |  | (10,184) | ​ |  | 95,405
Residential collateralized mortgage obligations | ​ |  | 50,212 | ​ |  | 0 | ​ |  | (3,750) | ​ |  | 46,462
Commercial mortgage-backed securities | ​ |  | 76,412 | ​ |  | 0 | ​ |  | (9,730) | ​ |  | 66,682
Private label commercial mortgage-backed securities | ​ | ​ | 8,215 | ​ |  | 0 | ​ |  | (55) | ​ |  | 8,160
Total available-for-sale debt securities | ​ | $ | 464,968 | ​ | $ | 351 | ​ | $ | (49,564) | ​ | $ | 415,755
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) |  | December 31, 2022
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Unrealized | ​ | Unrealized | ​ | ​ | ​
​ |  | Amortized |  | Holding |  | Holding |  | Fair
​ |  | Cost |  | Gains |  | Losses |  | Value
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Obligations of the U.S. Treasury | ​ | $ | 35,166 | ​ | $ | 0 | ​ | $ | (3,330) | ​ | $ | 31,836
Obligations of U.S. Government agencies | ​ | ​ | 25,938 | ​ | ​ | 0 | ​ | ​ | (2,508) | ​ | ​ | 23,430
Bank holding company debt securities | ​ | ​ | 28,945 | ​ | ​ | 0 | ​ | ​ | (3,559) | ​ | ​ | 25,386
Obligations of states and political subdivisions: | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  |
Tax-exempt | ​ |  | 146,149 | ​ |  | 319 | ​ |  | (13,845) | ​ |  | 132,623
Taxable | ​ |  | 68,488 | ​ |  | 0 | ​ |  | (11,676) | ​ |  | 56,812
Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Residential pass-through securities | ​ |  | 112,782 | ​ |  | 0 | ​ |  | (12,841) | ​ |  | 99,941
Residential collateralized mortgage obligations | ​ |  | 44,868 | ​ |  | 0 | ​ |  | (4,572) | ​ |  | 40,296
Commercial mortgage-backed securities | ​ |  | 91,388 | ​ |  | 0 | ​ |  | (11,702) | ​ |  | 79,686
Private label commercial mortgage-backed securities | ​ | ​ | 8,070 | ​ | ​ | 2 | ​ | ​ | (49) | ​ | ​ | 8,023
Total available-for-sale debt securities | ​ | $ | 561,794 | ​ | $ | 321 | ​ | $ | (64,082) | ​ | $ | 498,033
Schedule of gross unrealized losses and fair value of available-for-sale debt securities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2023 |  | Less Than 12 Months |  | 12 Months or More |  | Total
(In Thousands) | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized
​ |  | Value |  | Losses |  | Value |  | Losses |  | Value |  | Losses
Obligations of the U.S. Treasury | ​ | $ | 0 | ​ | $ | 0 | ​ | $ | 11,290 | ​ | $ | (1,035) | ​ | $ | 11,290 | ​ | $ | (1,035)
Obligations of U.S. Government agencies | ​ | ​ | 1,595 | ​ | ​ | (9) | ​ | ​ | 8,351 | ​ | ​ | (1,164) | ​ | ​ | 9,946 | ​ | ​ | (1,173)
Bank holding company debt securities | ​ | ​ | 0 | ​ | ​ | 0 | ​ | ​ | 23,500 | ​ | ​ | (5,452) | ​ | ​ | 23,500 | ​ | ​ | (5,452)
Obligations of states and political subdivisions: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Tax-exempt | ​ | ​ | 3,257 | ​ | ​ | (24) | ​ | ​ | 96,758 | ​ | ​ | (9,552) | ​ | ​ | 100,015 | ​ | ​ | (9,576)
Taxable | ​ |  | 0 | ​ | ​ | 0 | ​ |  | 49,961 | ​ | ​ | (8,609) | ​ |  | 49,961 | ​ |  | (8,609)
Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies: | ​ |  | ​ | ​ | ​ | ​ | ​ |  | ​ | ​ | ​ | ​ | ​ |  |  | ​ |  |
Residential pass-through securities | ​ | ​ | 3,334 | ​ | ​ | (27) | ​ | ​ | 84,297 | ​ | ​ | (10,157) | ​ | ​ | 87,631 | ​ | ​ | (10,184)
Residential collateralized mortgage obligations | ​ |  | 3,588 | ​ | ​ | (2) | ​ |  | 32,808 | ​ | ​ | (3,748) | ​ |  | 36,396 | ​ |  | (3,750)
Commercial mortgage-backed securities | ​ |  | 2,327 | ​ | ​ | (16) | ​ |  | 64,355 | ​ | ​ | (9,714) | ​ |  | 66,682 | ​ |  | (9,730)
Private label commercial mortgage-backed securities | ​ | ​ | 8,160 | ​ | ​ | (55) | ​ | ​ | 0 | ​ | ​ | 0 | ​ | ​ | 8,160 | ​ | ​ | (55)
Total | ​ | $ | 22,261 | ​ | $ | (133) | ​ | $ | 371,320 | ​ | $ | (49,431) | ​ | $ | 393,581 | ​ | $ | (49,564)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2022 |  | Less Than 12 Months |  | 12 Months or More |  | Total
(In Thousands) | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized
​ |  | Value |  | Losses |  | Value |  | Losses |  | Value |  | Losses
Obligations of the U.S. Treasury | ​ | $ | 20,192 | ​ | $ | (1,939) | ​ | $ | 11,644 | ​ | $ | (1,391) | ​ | $ | 31,836 | ​ | $ | (3,330)
Obligations of U.S. Government agencies | ​ | ​ | 8,509 | ​ | ​ | (430) | ​ | ​ | 12,921 | ​ | ​ | (2,078) | ​ | ​ | 21,430 | ​ | ​ | (2,508)
Bank holding company debt securities | ​ | ​ | 14,248 | ​ | ​ | (1,697) | ​ | ​ | 11,138 | ​ | ​ | (1,862) | ​ | ​ | 25,386 | ​ | ​ | (3,559)
Obligations of states and political subdivisions: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Tax-exempt | ​ | ​ | 106,204 | ​ | ​ | (11,023) | ​ | ​ | 15,153 | ​ | ​ | (2,822) | ​ | ​ | 121,357 | ​ | ​ | (13,845)
Taxable | ​ |  | 28,901 | ​ |  | (4,739) | ​ |  | 27,761 | ​ |  | (6,937) | ​ |  | 56,662 | ​ |  | (11,676)
Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies: | ​ |  |  | ​ |  |  | ​ |  | ​ | ​ |  |  | ​ |  |  | ​ |  |
Residential pass-through securities | ​ | ​ | 45,410 | ​ | ​ | (4,226) | ​ | ​ | 54,531 | ​ | ​ | (8,615) | ​ | ​ | 99,941 | ​ | ​ | (12,841)
Residential collateralized mortgage obligations | ​ |  | 28,670 | ​ |  | (2,042) | ​ |  | 11,626 | ​ |  | (2,530) | ​ |  | 40,296 | ​ |  | (4,572)
Commercial mortgage-backed securities | ​ |  | 40,408 | ​ |  | (2,585) | ​ |  | 39,278 | ​ |  | (9,117) | ​ |  | 79,686 | ​ |  | (11,702)
Private label commercial mortgage-backed securities | ​ | ​ | 4,762 | ​ | ​ | (49) | ​ | ​ | 0 | ​ | ​ | 0 | ​ | ​ | 4,762 | ​ | ​ | (49)
Total | ​ | $ | 297,304 | ​ | $ | (28,730) | ​ | $ | 184,052 | ​ | $ | (35,352) | ​ | $ | 481,356 | ​ | $ | (64,082)
Schedule of gross realized gains and losses from available-for-sale | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) | ​ | 2023 | ​ | 2022 | ​ | 2021
Gross realized gains from sales | ​ | $ | 89 | ​ | $ | 48 | ​ | $ | 27
Gross realized losses from sales | ​ |  | (3,125) | ​ |  | (28) | ​ |  | (3)
Net realized (losses) gains | ​ | $ | (3,036) | ​ | $ | 20 | ​ | $ | 24
Income tax provision related to net realized (losses) gains | ​ | $ | (638) | ​ | $ | 4 | ​ | $ | 5
Schedule of the amortized cost and fair value of available-for-sale debt securities by contractual maturity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
(In Thousands) | ​ | December 31, 2023
​ | ​ | Amortized | ​ | Fair
​ |  | Cost |  | Value
Due in one year or less | ​ | $ | 13,200 | ​ | $ | 12,937
Due from one year through five years | ​ |  | 27,951 | ​ |  | 26,299
Due from five years through ten years | ​ |  | 77,246 | ​ |  | 67,709
Due after ten years | ​ |  | 106,183 | ​ |  | 92,101
Sub-total | ​ |  | 224,580 | ​ |  | 199,046
Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies: | ​ |  |  | ​ |  |
Residential pass-through securities | ​ |  | 105,549 | ​ |  | 95,405
Residential collateralized mortgage obligations | ​ |  | 50,212 | ​ |  | 46,462
Commercial mortgage-backed securities | ​ |  | 76,412 | ​ |  | 66,682
Private label commercial mortgage-backed securities | ​ | ​ | 8,215 | ​ | ​ | 8,160
Total | ​ | $ | 464,968 | ​ | $ | 415,755

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