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INVESTMENT SECURITIES (Tables) | 3 Months Ended
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Mar. 31, 2026
INVESTMENT SECURITIES |
Schedule of gross amortized cost and fair value of available-for-sale debt securities and the related gross unrealized gains and losses recognized in accumulated other comprehensive income | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ ​ ​ | ​ | ​ ​ ​ | Gross | ​ ​ ​ | Gross |  | ​ ​ ​ | ​
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized |  | Fair
March 31, 2026 (in thousands) | ​ | Cost | ​ | Gains | ​ | Losses |  | Value
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. Treasury securities and U.S. Government agencies | ​ | $ | 269,953 | ​ | $ | 62 | ​ | $ | (2,470) | ​ | $ | 267,545
Private label mortgage-backed security | ​ |  | — | ​ |  | 1,359 | ​ |  | — | ​ |  | 1,359
Mortgage-backed securities - residential | ​ |  | 596,356 | ​ |  | 1,913 | ​ |  | (8,023) | ​ |  | 590,246
Collateralized mortgage obligations | ​ |  | 17,066 | ​ |  | 29 | ​ |  | (397) | ​ |  | 16,698
Corporate bonds | ​ |  | 1,001 | ​ |  | — | ​ |  | — | ​ |  | 1,001
Trust preferred security | ​ |  | 3,938 | ​ |  | 134 | ​ |  | — | ​ |  | 4,072
Total available-for-sale debt securities | ​ | $ | 888,314 | ​ | $ | 3,497 | ​ | $ | (10,890) | ​ | $ | 880,921
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ ​ ​ | ​ | ​ ​ ​ | Gross | ​ ​ ​ | Gross |  | ​ ​ ​ | ​
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized |  | Fair
December 31, 2025 (in thousands) | ​ | Cost | ​ | Gains | ​ | Losses |  | Value
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. Treasury securities and U.S. Government agencies | ​ | $ | 294,940 | ​ | $ | 159 | ​ | $ | (1,724) | ​ | $ | 293,375
Private label mortgage-backed security | ​ |  | — | ​ |  | 1,439 | ​ |  | — | ​ |  | 1,439
Mortgage-backed securities - residential | ​ |  | 570,491 | ​ |  | 4,210 | ​ |  | (6,792) | ​ |  | 567,909
Collateralized mortgage obligations | ​ |  | 17,528 | ​ |  | 27 | ​ |  | (648) | ​ |  | 16,907
Corporate bonds | ​ |  | 1,001 | ​ |  | — | ​ |  | — | ​ |  | 1,001
Trust preferred security | ​ |  | 3,924 | ​ |  | 138 | ​ |  | — | ​ |  | 4,062
Total available-for-sale debt securities | ​ | $ | 887,884 | ​ | $ | 5,973 | ​ | $ | (9,164) | ​ | $ | 884,693
Schedule of carrying value, gross unrecognized gains and losses, and fair value of held-to-maturity debt securities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ ​ ​ | ​ ​ ​ | ​ | ​ ​ ​ | Gross | ​ ​ ​ | Gross | ​ ​ ​ | ​ ​ ​ | ​
​ | ​ | Amortized | ​ | Unrecognized | ​ | Unrecognized | ​ | Fair
March 31, 2026 (in thousands) | ​ | Cost | ​ | Gains | ​ | Losses | ​ | Value
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Mortgage-backed securities - residential | ​ | $ | 13 | ​ | $ | — | ​ | $ | — | ​ | $ | 13
Collateralized mortgage obligations | ​ |  | 4,762 | ​ |  | 30 | ​ |  | (30) | ​ |  | 4,762
Total held-to-maturity debt securities | ​ | $ | 4,775 | ​ | $ | 30 | ​ | $ | (30) | ​ | $ | 4,775
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ ​ ​ | ​ ​ ​ | ​ | ​ ​ ​ | Gross | ​ ​ ​ | Gross | ​ ​ ​ | ​ ​ ​ | ​
​ | ​ | Amortized | ​ | Unrecognized | ​ | Unrecognized | ​ | Fair
December 31, 2025 (in thousands) | ​ | Cost | ​ | Gains | ​ | Losses | ​ | Value
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Mortgage-backed securities - residential | ​ | $ | 13 | ​ | $ | — | ​ | $ | — | ​ | $ | 13
Collateralized mortgage obligations | ​ |  | 4,931 | ​ |  | 29 | ​ |  | (44) | ​ |  | 4,916
Total held-to-maturity debt securities | ​ | $ | 4,944 | ​ | $ | 29 | ​ | $ | (44) | ​ | $ | 4,929
Schedule of amortized cost and fair value of debt securities by contractual maturity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Available-for-Sale | ​ | Held-to-Maturity
​ | ​ | Debt Securities | ​ | Debt Securities
​ | ​ ​ ​ | Amortized | ​ ​ ​ | Fair | ​ ​ ​ | Amortized | ​ ​ ​ | Fair
March 31, 2026 (in thousands) | ​ | Cost | ​ | Value | ​ | Cost | ​ | Value
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Due in one year or less | ​ | $ | 105,961 | ​ | $ | 104,864 | ​ | $ | — | ​ | $ | —
Due from one year to five years | ​ |  | 164,993 | ​ |  | 163,682 | ​ |  | — | ​ |  | —
Due from five years to ten years | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | —
Due beyond ten years | ​ |  | 3,938 | ​ |  | 4,072 | ​ |  | — | ​ |  | —
Private label mortgage-backed security | ​ |  | — | ​ |  | 1,359 | ​ |  | — | ​ |  | —
Mortgage-backed securities - residential | ​ |  | 596,356 | ​ |  | 590,246 | ​ |  | 13 | ​ |  | 13
Collateralized mortgage obligations | ​ |  | 17,066 | ​ |  | 16,698 | ​ |  | 4,762 | ​ |  | 4,762
Total debt securities | ​ | $ | 888,314 | ​ | $ | 880,921 | ​ | $ | 4,775 | ​ | $ | 4,775
Schedule of debt securities with unrealized losses | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less than 12 months | ​ | 12 months or more | ​ | Total
​ | ​ ​ ​ | ​ | ​ | ​ ​ ​ | Unrealized | ​ ​ ​ | ​ | ​ | ​ ​ ​ | Unrealized | ​ ​ ​ | ​ | ​ | ​ ​ ​ | Unrealized
March 31, 2026 (in thousands) | ​ | Fair Value | ​ | Losses | ​ | Fair Value | ​ | Losses | ​ | Fair Value | ​ | Losses
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Available-for-sale debt securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. Treasury securities and U.S. Government agencies | ​ | $ | 163,632 | ​ | $ | (1,340) | ​ | $ | 78,862 | ​ | $ | (1,130) | ​ | $ | 242,494 | ​ | $ | (2,470)
Mortgage-backed securities - residential | ​ | ​ | 218,186 | ​ | ​ | (1,459) | ​ | ​ | 80,332 | ​ | ​ | (6,564) | ​ | ​ | 298,518 | ​ | ​ | (8,023)
Collateralized mortgage obligations | ​ | ​ | 598 | ​ | ​ | (2) | ​ | ​ | 13,868 | ​ | ​ | (395) | ​ | ​ | 14,466 | ​ | ​ | (397)
Total available-for-sale debt securities | ​ | $ | 382,416 | ​ | $ | (2,801) | ​ | $ | 173,062 | ​ | $ | (8,089) | ​ | $ | 555,478 | ​ | $ | (10,890)
​ ​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less than 12 months | ​ | 12 months or more | ​ | Total
​ | ​ ​ ​ | ​ | ​ | ​ ​ ​ | Unrealized | ​ ​ ​ | ​ | ​ | ​ ​ ​ | Unrealized | ​ ​ ​ | ​ | ​ | ​ ​ ​ | Unrealized
December 31, 2025 (in thousands) | ​ | Fair Value | ​ | Losses | ​ | Fair Value | ​ | Losses | ​ | Fair Value | ​ | Losses
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Available-for-sale debt securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. Treasury securities and U.S. Government agencies | ​ | $ | 84,947 | ​ | $ | (53) | ​ | $ | 78,317 | ​ | $ | (1,671) | ​ | $ | 163,264 | ​ | $ | (1,724)
Mortgage-backed securities - residential | ​ | ​ | 84,131 | ​ | ​ | (149) | ​ | ​ | 86,744 | ​ | ​ | (6,643) | ​ | ​ | 170,875 | ​ | ​ | (6,792)
Collateralized mortgage obligations | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 14,242 | ​ | ​ | (648) | ​ | ​ | 14,242 | ​ | ​ | (648)
Total available-for-sale debt securities | ​ | $ | 169,078 | ​ | $ | (202) | ​ | $ | 179,303 | ​ | $ | (8,962) | ​ | $ | 348,381 | ​ | $ | (9,164)
​ ​
Schedule of pledged investment securities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of | ​
(in thousands) | ​ ​ ​ | March 31, 2026 | ​ ​ ​ | December 31, 2025 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Amortized cost | ​ | $ | 143,060 | ​ | $ | 168,530 | ​
Fair value | ​ |  | 141,459 | ​ |  | 166,757 | ​
Carrying amount | ​ | ​ | 141,459 | ​ | ​ | 166,757 | ​
Schedule of the amortized cost and fair value of equity securities with readily determinable fair values | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ ​ ​ | ​ | ​ ​ ​ | Gross | ​ ​ ​ | Gross | ​ ​ ​ | ​ ​ ​ | ​
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Fair
March 31, 2026 (in thousands) | ​ | Cost | ​ | Gains | ​ | Losses | ​ | Value
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Freddie Mac preferred stock | ​ | $ | — | ​ | $ | 945 | ​ | $ | — | ​ | $ | 945
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ ​ ​ | ​ | ​ ​ ​ | Gross | ​ ​ ​ | Gross | ​ ​ ​ | ​ ​ ​ | ​
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Fair
December 31, 2025 (in thousands) | ​ | Cost | ​ | Gains | ​ | Losses | ​ | Value
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Freddie Mac preferred stock | ​ | $ | — | ​ | $ | 945 | ​ | $ | — | ​ | $ | 945
Schedule of equity securities with readily determinable fair values, the gross realized and unrealized gains and losses recognized | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Gains (Losses) Recognized on Equity Securities | ​
​ | ​ | Three Months Ended March 31, 2026 | ​ ​ ​ | Three Months Ended March 31, 2025 | ​ ​ ​
(in thousands) | ​ ​ ​ | Realized | ​ ​ ​ | Unrealized | ​ ​ ​ | Total | ​ ​ ​ | Realized | ​ ​ ​ | Unrealized | ​ ​ ​ | Total | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Freddie Mac preferred stock | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 31 | ​ | $ | 31 | ​
​

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