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SECURITIES AVAILABLE FOR SALE (Tables) | 9 Months Ended
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Sep. 30, 2023
SECURITIES AVAILABLE FOR SALE |
Summary of Securities Available for Sale | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Unrealized | ​ | Unrealized | ​ | ​ | ​
(in thousands) |  | Amortized Cost |  | Gains |  | Losses |  | Fair Value
September 30, 2023 |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Debt securities: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Obligations of US Government-sponsored enterprises | ​ | $ | 2,218 | ​ | $ | 1 | ​ | $ | (40) | ​ | $ | 2,179
Mortgage-backed securities and collateralized mortgage obligations: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
US Government-sponsored enterprises | ​ | ​ | 230,746 | ​ | ​ | 2 | ​ | ​ | (41,025) | ​ | ​ | 189,723
US Government agency | ​ |  | 84,324 | ​ |  | — | ​ |  | (13,890) | ​ |  | 70,434
Private label | ​ |  | 61,235 | ​ |  | 23 | ​ |  | (2,413) | ​ |  | 58,845
Obligations of states and political subdivisions thereof | ​ |  | 115,908 | ​ |  | 9,305 | ​ |  | (27,805) | ​ |  | 97,408
Corporate bonds | ​ |  | 101,491 | ​ |  | 31 | ​ |  | (10,658) | ​ |  | 90,864
Total securities available for sale | ​ | $ | 595,922 | ​ | $ | 9,362 | ​ | $ | (95,831) | ​ | $ | 509,453
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Unrealized | ​ | Unrealized | ​ | ​ | ​
(in thousands) |  | Amortized Cost |  | Gains |  | Losses |  | Fair Value
December 31, 2022 | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Debt securities: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Obligations of US Government-sponsored enterprises | ​ | $ | 2,692 | ​ | $ | 5 | ​ | $ | (37) | ​ | $ | 2,660
Mortgage-backed securities and collateralized mortgage obligations: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
US Government-sponsored enterprises | ​ | ​ | 249,838 | ​ | ​ | 14 | ​ | ​ | (34,825) | ​ | ​ | 215,027
US Government agency | ​ |  | 90,318 | ​ |  | 16 | ​ |  | (10,728) | ​ |  | 79,606
Private label | ​ |  | 64,056 | ​ |  | 34 | ​ |  | (3,936) | ​ |  | 60,154
Obligations of states and political subdivisions thereof | ​ |  | 121,939 | ​ |  | 7,149 | ​ |  | (21,351) | ​ |  | 107,737
Corporate bonds | ​ |  | 102,505 | ​ |  | 33 | ​ |  | (8,206) | ​ |  | 94,332
Total securities available for sale | ​ | $ | 631,348 | ​ | $ | 7,251 | ​ | $ | (79,083) | ​ | $ | 559,516
Schedule of Amortized Cost and Estimated Fair Value of Available for Sale (AFS) Securities, Segregated by Contractual Maturity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Available for sale
(in thousands) |  | Amortized Cost |  | Fair Value
Within 1 year |  | $ | 3,051 | ​ | $ | 3,022
Over 1 year to 5 years | ​ |  | 36,218 | ​ |  | 33,257
Over 5 years to 10 years | ​ |  | 51,635 | ​ |  | 54,313
Over 10 years | ​ |  | 128,713 | ​ |  | 99,859
Total bonds and obligations | ​ |  | 219,617 | ​ |  | 190,451
Mortgage-backed securities and collateralized mortgage obligations | ​ |  | 376,305 | ​ |  | 319,002
Total securities available for sale | ​ | $ | 595,922 | ​ | $ | 509,453
Schedule of Gains and Losses from Sale of AFS Securities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Nine Months Ended | ​
​ | ​ | September 30, | ​ | September 30, | ​
(in thousands) |  | 2023 |  | 2022 |  | 2023 |  | 2022 |
Gross gains on sales of available for sale securities | ​ | $ | — | ​ | $ | 142 | ​ | $ | 34 | ​ | $ | 151 | ​
Gross losses on sales of available for sale securities | ​ |  | — | ​ |  | (98) | ​ |  | — | ​ |  | (98) | ​
Net gains on sale of available for sale securities | ​ | $ | — | ​ | $ | 44 | ​ | $ | 34 | ​ | $ | 53 | ​
Schedule of Securities with Unrealized Losses, Segregated by the Duration of Continuous Unrealized Loss Positions | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less Than Twelve Months | ​ | Over Twelve Months | ​ | Total
​ | ​ | Gross |  | ​ | ​ |  | Gross |  | ​ | ​ |  | Gross |  | ​ | ​
​ | ​ | Unrealized | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized | ​ | Fair
(in thousands) |  | Losses |  | Value |  | Losses |  | Value |  | Losses |  | Value
September 30, 2023 |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Debt securities: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Obligations of US Government-sponsored enterprises | ​ | $ | — | ​ | $ | 8 | ​ | $ | 40 | ​ | $ | 930 | ​ | $ | 40 | ​ | $ | 938
Mortgage-backed securities and collateralized mortgage obligations: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
US Government-sponsored enterprises | ​ | ​ | 154 | ​ | ​ | 4,373 | ​ | ​ | 40,871 | ​ | ​ | 184,991 | ​ | ​ | 41,025 | ​ | ​ | 189,364
US Government agency | ​ |  | 43 | ​ |  | 2,627 | ​ |  | 13,847 | ​ |  | 67,729 | ​ |  | 13,890 | ​ |  | 70,356
Private label | ​ |  | 1 | ​ |  | 25 | ​ |  | 2,412 | ​ |  | 58,797 | ​ |  | 2,413 | ​ |  | 58,822
Obligations of states and political subdivisions thereof | ​ |  | 571 | ​ |  | 7,386 | ​ |  | 27,234 | ​ |  | 88,571 | ​ |  | 27,805 | ​ |  | 95,957
Corporate bonds | ​ |  | 1,079 | ​ |  | 6,921 | ​ |  | 9,579 | ​ |  | 80,918 | ​ |  | 10,658 | ​ |  | 87,839
Total securities available for sale | ​ | $ | 1,848 | ​ | $ | 21,340 | ​ | $ | 93,983 | ​ | $ | 481,936 | ​ | $ | 95,831 | ​ | $ | 503,276
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less Than Twelve Months | ​ | Over Twelve Months | ​ | Total
​ |  | Gross |  | ​ | ​ |  | Gross |  | ​ | ​ |  | Gross |  | ​ | ​
​ | ​ | Unrealized | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized | ​ | Fair
(in thousands) | ​ | Losses | ​ | Value | ​ | Losses | ​ | Value | ​ | Losses | ​ | Value
December 31, 2022 |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Debt securities: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Obligations of US Government-sponsored enterprises | ​ | $ | 32 | ​ | $ | 435 | ​ | $ | 6 | ​ | $ | 790 | ​ | $ | 38 | ​ | $ | 1,225
Mortgage-backed securities and collateralized mortgage obligations: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
US Government-sponsored enterprises | ​ | ​ | 7,005 | ​ | ​ | 82,483 | ​ | ​ | 27,820 | ​ | ​ | 127,745 | ​ | ​ | 34,825 | ​ | ​ | 210,228
US Government agency | ​ |  | 2,870 | ​ |  | 42,430 | ​ |  | 7,857 | ​ |  | 34,198 | ​ |  | 10,727 | ​ |  | 76,628
Private label | ​ |  | 841 | ​ |  | 15,694 | ​ |  | 3,095 | ​ |  | 44,396 | ​ |  | 3,936 | ​ |  | 60,090
Obligations of states and political subdivisions thereof | ​ |  | 7,990 | ​ |  | 48,799 | ​ |  | 13,361 | ​ |  | 55,702 | ​ |  | 21,351 | ​ |  | 104,501
Corporate bonds | ​ |  | 4,733 | ​ |  | 65,279 | ​ |  | 3,473 | ​ |  | 25,027 | ​ |  | 8,206 | ​ |  | 90,306
Total securities available for sale | ​ | $ | 23,471 | ​ | $ | 255,120 | ​ | $ | 55,612 | ​ | $ | 287,858 | ​ | $ | 79,083 | ​ | $ | 542,978

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