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INVESTMENT SECURITIES (Tables) | 9 Months Ended
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Sep. 30, 2021
INVESTMENT SECURITIES |
Schedule of amortized cost and fair value of securities available-for-sale and securities held-to-maturity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Unrealized/ | ​ | Unrealized/ | ​ | ​ | ​
​ | ​ | Amortized | ​ | Unrecognized | ​ | Unrecognized | ​ | ​ | ​
At September 30, 2021 |  | Cost |  | Gains |  | Losses |  | Fair Value
Debt securities available for sale: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Residential mortgage securities | ​ | $ | 504,167 | ​ | $ | 1,123 | ​ | $ | (3,859) | ​ | $ | 501,431
Commercial mortgage securities | ​ | ​ | 18,270 | ​ | ​ | 249 | ​ | ​ | (263) | ​ | ​ | 18,256
Asset-backed securities | ​ | ​ | 4,750 | ​ | ​ | — | ​ | ​ | (17) | ​ | ​ | 4,733
U.S. Government agency | ​ | ​ | 67,994 | ​ | ​ | — | ​ | ​ | (763) | ​ | ​ | 67,231
Securities issued by states and political subdivisions in the U.S | ​ | ​ | 11,836 | ​ | ​ | — | ​ | ​ | (319) | ​ | ​ | 11,517
Total securities available-for-sale | ​ | $ | 607,017 | ​ | $ | 1,372 | ​ | $ | (5,221) | ​ | $ | 603,168
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Held-to-maturity securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Residential mortgage securities | ​ | $ | 2,017 | ​ | ​ | 57 | ​ | ​ | — | ​ | ​ | 2,074
Total securities held-to-maturity | ​ | $ | 2,017 | ​ | $ | 57 | ​ | $ | — | ​ | $ | 2,074
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Equity investments: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
CRA Mutual Fund | ​ | $ | 2,320 | ​ | ​ | — | ​ | ​ | (31) | ​ | ​ | 2,289
Total non-trading equity investment securities | ​ | $ | 2,320 | ​ | $ | — | ​ | $ | (31) | ​ | $ | 2,289
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Unrealized/ | ​ | Unrealized/ | ​ | ​ | ​
​ | ​ | Amortized | ​ | Unrecognized | ​ | Unrecognized | ​ | ​ | ​
At December 31, 2020 |  | Cost |  | Gains |  | Losses |  | Fair Value
Debt securities available for sale: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Residential mortgage securities | ​ | $ | 192,163 | ​ | $ | 2,599 | ​ | $ | (74) | ​ | $ | 194,688
Commercial mortgage securities | ​ | ​ | 32,589 | ​ | ​ | 997 | ​ | ​ | (94) | ​ | ​ | 33,492
U.S. Government agency | ​ | ​ | 37,997 | ​ | ​ | — | ​ | ​ | (81) | ​ | ​ | 37,916
Total securities available-for-sale | ​ | $ | 262,749 | ​ | $ | 3,596 | ​ | $ | (249) | ​ | $ | 266,096
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Held-to-maturity securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Residential mortgage securities | ​ | ​ | 2,760 | ​ | ​ | 67 | ​ | ​ | — | ​ | ​ | 2,827
Total securities held-to-maturity | ​ | $ | 2,760 | ​ | $ | 67 | ​ | $ | — | ​ | $ | 2,827
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Equity investments: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
CRA Mutual Fund | ​ | ​ | 2,299 | ​ | ​ | 14 | ​ | ​ | — | ​ | ​ | 2,313
Total non-trading equity investment securities | ​ | $ | 2,299 | ​ | $ | 14 | ​ | $ | — | ​ | $ | 2,313
​
Schedule of proceeds from sales and calls of securities and associated gains | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended September 30, | ​ | Nine months ended September 30,
​ | ​ | 2021 | ​ | 2020 |  | 2021 |  | 2020
Proceeds | ​ | $ | — | ​ | $ | 25,000 | ​ | $ | 43,241 | ​ | $ | 141,422
Gross gains | ​ | $ | — | ​ | $ | — | ​ | $ | 609 | ​ | $ | 3,286
Tax impact | ​ | $ | — | ​ | $ | — | ​ | $ | (195) | ​ | $ | (1,036)
Schedule of amortized cost and fair value of debt securities classified by contractual maturity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Held-to-Maturity | ​ | Available-for-Sale
At September 30, 2021 |  | Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value
Within one year | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | —
One to five years | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 47,994 | ​ | ​ | 47,475
Five to ten years | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 15,000 | ​ | ​ | 14,832
After ten years | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 16,836 | ​ | ​ | 16,441
Total | ​ | $ | — | ​ | $ | — | ​ | $ | 79,830 | ​ | $ | 78,748
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Residential mortgage securities | ​ | $ | 2,017 | ​ | $ | 2,074 | ​ | ​ | 504,167 | ​ | ​ | 501,431
Commercial mortgage securities | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 18,270 | ​ | ​ | 18,256
Asset-backed securities | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 4,750 | ​ | ​ | 4,733
Total Securities | ​ | $ | 2,017 | ​ | $ | 2,074 | ​ | $ | 607,017 | ​ | $ | 603,168
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Held-to-Maturity | ​ | Available-for-Sale
At December 31, 2020 |  | Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value
Within one year | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | —
One to five years | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 37,997 | ​ | ​ | 37,916
Five to ten years | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
Due after ten years | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
Total | ​ | $ | — | ​ | $ | — | ​ | $ | 37,997 | ​ | $ | 37,916
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Residential mortgage securities | ​ | $ | 2,760 | ​ | $ | 2,827 | ​ | $ | 192,163 | ​ | $ | 194,688
Commercial mortgage securities | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 32,589 | ​ | ​ | 33,492
Total Securities | ​ | $ | 2,760 | ​ | $ | 2,827 | ​ | $ | 262,749 | ​ | $ | 266,096
​
Schedule of securities with unrealized/unrecognized losses | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less than 12 Months | ​ | 12 months or more | ​ | Total
​ | ​ | Estimated | ​ | Unrealized | ​ | Estimated | ​ | Unrealized | ​ | Estimated | ​ | Unrealized
At September 30, 2021 |  | Fair Value |  | Losses |  | Fair Value |  | Losses |  | Fair Value |  | Losses
Debt securities available for sale: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Residential mortgage securities | ​ | $ | 315,184 | ​ | $ | (3,859) | ​ | $ | — | ​ | $ | — | ​ | $ | 315,184 | ​ | $ | (3,859)
Commercial mortgage securities | ​ | ​ | 14,919 | ​ | ​ | (263) | ​ | ​ | 379 | ​ | ​ | — | ​ | ​ | 15,298 | ​ | ​ | (263)
Asset-backed securities | ​ | ​ | 4,733 | ​ | ​ | (17) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 4,733 | ​ | ​ | (17)
U.S. Government agency securities | ​ | ​ | 39,546 | ​ | ​ | (451) | ​ | ​ | 27,685 | ​ | ​ | (312) | ​ | ​ | 67,231 | ​ | ​ | (763)
Securities issued by states and political subdivisions in the U.S | ​ | ​ | 11,517 | ​ | ​ | (319) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 11,517 | ​ | ​ | (319)
Total securities available for sale | ​ | $ | 385,899 | ​ | $ | (4,909) | ​ | $ | 28,064 | ​ | $ | (312) | ​ | $ | 413,963 | ​ | $ | (5,221)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less than 12 Months | ​ | 12 months or more | ​ | Total
​ | ​ | Estimated | ​ | Unrealized | ​ | Estimated | ​ | Unrealized | ​ | Estimated | ​ | Unrealized
At December 31, 2020 |  | Fair Value |  | Losses |  | Fair Value |  | Losses |  | Fair Value |  | Losses
Debt securities available for sale: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Residential mortgage securities | ​ | $ | 33,734 | ​ | ​ | (74) | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 33,734 | ​ | ​ | (74)
Commercial mortgage securities | ​ | ​ | 12,314 | ​ | ​ | (93) | ​ | ​ | 385 | ​ | ​ | (1) | ​ | ​ | 12,699 | ​ | ​ | (94)
U.S. Government agency securities | ​ | ​ | 37,916 | ​ | ​ | (81) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 37,916 | ​ | ​ | (81)
Total securities available-for-sale | ​ | $ | 83,964 | ​ | $ | (248) | ​ | $ | 385 | ​ | $ | (1) | ​ | $ | 84,349 | ​ | $ | (249)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

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