v3.25.3

SECURITIES (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2025
SECURITIES |
Summary of AFS Securities Portfolio | The following table provides a summary of the Company’s securities AFS portfolio as of: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Amortized | ​ | Gross Unrealized | ​ | Allowance for | ​ | Estimated
(dollars in thousands) | ​ | Cost | ​ | Gains | ​ | Losses | ​ | Credit Losses | ​ | Fair Value
September 30, 2025: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Collateralized mortgage obligations | ​ | $ | 510,862 | ​ | $ | 110 | ​ | $ | (1,317) | ​ | $ | — | ​ | $ | 509,655
Agency mortgage-backed securities | ​ | ​ | 865,015 | ​ | ​ | 7,140 | ​ | ​ | (204) | ​ | ​ | — | ​ | ​ | 871,951
Municipal bonds | ​ | ​ | 47,218 | ​ | ​ | 1 | ​ | ​ | (1,317) | ​ | ​ | — | ​ | ​ | 45,902
SBA securities | ​ | ​ | 7,381 | ​ | ​ | 2 | ​ | ​ | (83) | ​ | ​ | — | ​ | ​ | 7,300
Beneficial interests in FHLMC securitization | ​ |  | 673 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (68) | ​ |  | 605
Corporate bonds | ​ |  | 124,728 | ​ | ​ | 10 | ​ | ​ | (5,445) | ​ | ​ | (566) | ​ |  | 118,727
U.S. Treasury | ​ |  | 999 | ​ | ​ | 8 | ​ | ​ | (8) | ​ | ​ | — | ​ |  | 999
Total | ​ | $ | 1,556,876 | ​ | $ | 7,271 | ​ | $ | (8,374) | ​ | $ | (634) | ​ | $ | 1,555,139
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2024: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Collateralized mortgage obligations | ​ | $ | 11,121 | ​ | $ | — | ​ | $ | (1,279) | ​ | $ | — | ​ | $ | 9,842
Agency mortgage-backed securities | ​ | ​ | 1,126,861 | ​ | ​ | 2,308 | ​ | ​ | (7,543) | ​ | ​ | — | ​ | ​ | 1,121,626
Municipal bonds | ​ | ​ | 48,921 | ​ | ​ | — | ​ | ​ | (3,386) | ​ | ​ | — | ​ | ​ | 45,535
SBA securities | ​ | ​ | 9,236 | ​ | ​ | 2 | ​ | ​ | (93) | ​ | ​ | — | ​ | ​ | 9,145
Beneficial interests in FHLMC securitization | ​ |  | 4,619 | ​ |  | — | ​ |  | — | ​ |  | (3,377) | ​ |  | 1,242
Corporate bonds | ​ |  | 133,767 | ​ |  | — | ​ |  | (7,193) | ​ |  | (757) | ​ |  | 125,817
U.S. Treasury | ​ |  | 700 | ​ |  | — | ​ |  | (22) | ​ |  | — | ​ |  | 678
Total | ​ | $ | 1,335,225 | ​ | $ | 2,310 | ​ | $ | (19,516) | ​ | $ | (4,134) | ​ | $ | 1,313,885
Summary of HTM Securities Portfolio | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Amortized | ​ | Gross Unrecognized | ​ | Allowance for | ​ | Estimated
(dollars in thousands) | ​ | Cost | ​ | Gains | ​ | Losses | ​ | Credit Losses | ​ | Fair Value
September 30, 2025: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Agency mortgage-backed securities | ​ | $ | 647,619 | ​ | $ | — | ​ | $ | (50,325) | ​ | $ | — | ​ | $ | 597,294
Total | ​ | $ | 647,619 | ​ | $ | — | ​ | $ | (50,325) | ​ | $ | — | ​ | $ | 597,294
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2024: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Agency mortgage-backed securities | ​ | $ | 712,105 | ​ | $ | — | ​ | $ | (75,265) | ​ | $ | — | ​ | $ | 636,840
Total | ​ | $ | 712,105 | ​ | $ | — | ​ | $ | (75,265) | ​ | $ | — | ​ | $ | 636,840
Schedule of Securities in a Continuous Unrealized Loss Position Aggregated by Investment Category and Length of Time | The tables below indicate the gross unrealized losses and fair values of our securities AFS portfolio, aggregated by investment category and length of time that the individual securities have been in a continuous unrealized loss position. ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Securities with Unrealized Loss at September 30, 2025
​ | ​ | Less than 12 months | ​ | 12 months or more | ​ | Total
​ | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized
(dollars in thousands) |  | Value |  | Loss |  | Value |  | Loss |  | Value |  | Loss
Collateralized mortgage obligations | ​ | $ | 354,507 | ​ | $ | (304) | ​ | $ | 6,597 | ​ | $ | (1,013) | ​ | $ | 361,104 | ​ | $ | (1,317)
Agency mortgage-backed securities | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 3,639 | ​ | ​ | (204) | ​ | ​ | 3,639 | ​ | ​ | (204)
Municipal bonds | ​ | ​ | 1,374 | ​ | ​ | (7) | ​ | ​ | 32,217 | ​ | ​ | (1,310) | ​ | ​ | 33,591 | ​ | ​ | (1,317)
SBA securities | ​ | ​ | 632 | ​ | ​ | (2) | ​ | ​ | 6,176 | ​ | ​ | (81) | ​ | ​ | 6,808 | ​ | ​ | (83)
Corporate bonds | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 97,783 | ​ | ​ | (5,445) | ​ | ​ | 97,783 | ​ | ​ | (5,445)
U.S. Treasury | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 492 | ​ | ​ | (8) | ​ | ​ | 492 | ​ | ​ | (8)
Total | ​ | $ | 356,513 | ​ | $ | (313) | ​ | $ | 146,904 | ​ | $ | (8,061) | ​ | $ | 503,417 | ​ | $ | (8,374)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Securities with Unrealized Loss at December 31, 2024
​ | ​ | Less than 12 months | ​ | 12 months or more | ​ | Total
​ | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized
(dollars in thousands) |  | Value |  | Loss |  | Value |  | Loss |  | Value |  | Loss
Collateralized mortgage obligations |  | $ | 2,874 |  | $ | (51) |  | $ | 6,968 |  | $ | (1,228) |  | $ | 9,842 |  | $ | (1,279)
Agency mortgage-backed securities | ​ | ​ | 719,329 | ​ | ​ | (7,218) | ​ | ​ | 4,280 | ​ | ​ | (325) | ​ | ​ | 723,609 | ​ | ​ | (7,543)
Municipal bonds | ​ | ​ | 2,129 | ​ | ​ | (101) | ​ | ​ | 43,405 | ​ | ​ | (3,285) | ​ | ​ | 45,534 | ​ | ​ | (3,386)
SBA securities | ​ | ​ | 614 | ​ | ​ | (1) | ​ | ​ | 7,739 | ​ | ​ | (92) | ​ | ​ | 8,353 | ​ | ​ | (93)
Corporate bonds | ​ | ​ | 14,242 | ​ | ​ | (758) | ​ | ​ | 112,333 | ​ | ​ | (6,435) | ​ | ​ | 126,575 | ​ | ​ | (7,193)
U.S. Treasury |  | ​ | — | ​ |  | — | ​ |  | 678 | ​ |  | (22) | ​ |  | 678 | ​ |  | (22)
Total | ​ | $ | 739,188 | ​ | $ | (8,129) | ​ | $ | 175,403 | ​ | $ | (11,387) | ​ | $ | 914,591 | ​ | $ | (19,516)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Securities with Unrecognized Loss at September 30, 2025
​ | ​ | Less than 12 months | ​ | 12 months or more | ​ | Total
​ | ​ | Fair | ​ | Unrecognized | ​ | Fair | ​ | Unrecognized | ​ | Fair | ​ | Unrecognized
(dollars in thousands) |  | Value |  | Loss |  | Value |  | Loss |  | Value |  | Loss
Agency mortgage-backed securities | ​ | $ | — | ​ | $ | — | ​ | $ | 597,294 | ​ | $ | (50,325) | ​ | $ | 597,294 | ​ | $ | (50,325)
Total | ​ | $ | — | ​ | $ | — | ​ | $ | 597,294 | ​ | $ | (50,325) | ​ | $ | 597,294 | ​ | $ | (50,325)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Securities with Unrecognized Loss at December 31, 2024
​ | ​ | Less than 12 months | ​ | 12 months or more | ​ | Total
​ | ​ | Fair | ​ | Unrecognized | ​ | Fair | ​ | Unrecognized | ​ | Fair | ​ | Unrecognized
(dollars in thousands) |  | Value |  | Loss |  | Value |  | Loss |  | Value |  | Loss
Agency mortgage-backed securities | ​ | $ | 15,440 | ​ | $ | (61) | ​ | $ | 621,400 | ​ | $ | (75,204) | ​ | $ | 636,840 | ​ | $ | (75,265)
Total | ​ | $ | 15,440 | ​ | $ | (61) | ​ | $ | 621,400 | ​ | $ | (75,204) | ​ | $ | 636,840 | ​ | $ | (75,265)
Summary of Allowance For Credit Losses - Securities AFS | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | Beginning |  | ​ | Provision (Reversal) |  | ​ | ​ |  | ​ | ​ |  | ​ | Ending
(dollars in thousands) | ​ | ​ | Balance | ​ | ​ | for Credit Losses | ​ | ​ | Charge-offs | ​ | ​ | Recoveries | ​ | ​ | Balance
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Three Months Ended September 30, 2025: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Beneficial interests in FHLMC securitization | ​ | $ | — | ​ | $ | 68 | ​ | $ | — | ​ | $ | — | ​ | $ | 68
Corporate bonds | ​ | ​ | 651 | ​ | ​ | (85) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 566
Total |  | $ | 651 |  | $ | (17) |  | $ | — |  | $ | — |  | $ | 634
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Nine Months Ended September 30, 2025: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Beneficial interests in FHLMC securitization | ​ | $ | 3,377 | ​ | $ | 52 | ​ | $ | (3,361) | ​ | $ | — | ​ | $ | 68
Corporate bonds | ​ | ​ | 757 | ​ | ​ | (191) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 566
Total |  | $ | 4,134 |  | $ | (139) |  | $ | (3,361) |  | $ | — |  | $ | 634
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Three Months Ended September 30, 2024: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Beneficial interests in FHLMC securitization | ​ | $ | 6,502 | ​ | $ | (24) | ​ | $ | — | ​ | $ | — | ​ | $ | 6,478
Corporate bonds | ​ | ​ | 840 | ​ | ​ | (19) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 821
Total | ​ | $ | 7,342 | ​ | $ | (43) | ​ | $ | — | ​ | $ | — | ​ | $ | 7,299
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Nine Months Ended September 30, 2024: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Beneficial interests in FHLMC securitization | ​ | $ | 6,818 | ​ | $ | (340) | ​ | $ | — | ​ | $ | — | ​ | $ | 6,478
Corporate bonds | ​ | ​ | 1,402 | ​ | ​ | (581) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 821
Total |  | $ | 8,220 |  | $ | (921) |  | $ | — |  | $ | — |  | $ | 7,299
Schedule Maturities of Securities AFS by Contractual Maturity | The amortized cost and fair value of investment securities AFS by contractual maturity were as follows for the periods indicated:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 1 Year or |  | More than 1 Year |  | More than 5 Years |  | More than |  | ​ | ​ |
(dollars in thousands) | ​ | Less | ​ | through 5 Years | ​ | through 10 Years | ​ | 10 Years | ​ | Total |
September 30, 2025 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Amortized Cost: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  | ​
Collateralized mortgage obligations | ​ | $ | — | ​ | $ | 157 | ​ | $ | 387 | ​ | $ | 510,318 | ​ | $ | 510,862 | ​
Agency mortgage-backed securities | ​ | ​ | — | ​ | ​ | 2,319 | ​ | ​ | — | ​ | ​ | 862,696 | ​ | ​ | 865,015 | ​
Municipal bonds | ​ | ​ | 1,152 | ​ | ​ | 22,821 | ​ | ​ | 22,151 | ​ | ​ | 1,094 | ​ | ​ | 47,218 | ​
SBA securities | ​ | ​ | — | ​ | ​ | 433 | ​ | ​ | 104 | ​ | ​ | 6,844 | ​ | ​ | 7,381 | ​
Beneficial interests in FHLMC securitization | ​ | ​ | — | ​ | ​ | 673 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 673 | ​
Corporate bonds | ​ | ​ | — | ​ | ​ | 58,474 | ​ | ​ | 61,254 | ​ | ​ | 5,000 | ​ | ​ | 124,728 | ​
U.S. Treasury | ​ |  | 500 | ​ | ​ | 499 | ​ | ​ | — | ​ | ​ | — | ​ |  | 999 | ​
Total | ​ | $ | 1,652 | ​ | $ | 85,376 | ​ | $ | 83,896 | ​ | $ | 1,385,952 | ​ | $ | 1,556,876 | ​
Weighted average yield | ​ |  | 2.07 | % |  | 5.41 | % |  | 3.16 | % |  | 5.34 | % |  | 5.22 | %
Estimated Fair Value: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​
Collateralized mortgage obligations | ​ | $ | — | ​ | $ | 150 | ​ | $ | 368 | ​ | $ | 509,137 | ​ | $ | 509,655 | ​
Agency mortgage-backed securities | ​ | ​ | — | ​ | ​ | 2,280 | ​ | ​ | — | ​ | ​ | 869,671 | ​ | ​ | 871,951 | ​
Municipal bonds | ​ | ​ | 1,152 | ​ | ​ | 22,520 | ​ | ​ | 21,336 | ​ | ​ | 894 | ​ | ​ | 45,902 | ​
SBA securities | ​ | ​ | — | ​ | ​ | 432 | ​ | ​ | 104 | ​ | ​ | 6,764 | ​ | ​ | 7,300 | ​
Beneficial interests in FHLMC securitization | ​ | ​ | — | ​ | ​ | 673 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 673 | ​
Corporate bonds | ​ | ​ | — | ​ | ​ | 57,345 | ​ | ​ | 57,899 | ​ | ​ | 4,049 | ​ | ​ | 119,293 | ​
U.S. Treasury | ​ |  | 492 | ​ | ​ | 507 | ​ | ​ | — | ​ | ​ | — | ​ |  | 999 | ​
Total | ​ | $ | 1,644 | ​ | $ | 83,907 | ​ | $ | 79,707 | ​ | $ | 1,390,515 | ​ | $ | 1,555,773 | ​
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 1 Year or |  | More than 1 Year |  | More than 5 Years |  | More than |  | ​ | ​ |
(dollars in thousands) | ​ | Less | ​ | through 5 Years | ​ | through 10 Years | ​ | 10 Years | ​ | Total |
December 31, 2024 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Amortized Cost: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  | ​
Collateralized mortgage obligations | ​ | $ | — | ​ | $ | 276 | ​ | $ | 154 | ​ | $ | 10,691 | ​ | $ | 11,121 | ​
Agency mortgage-backed securities | ​ | ​ | 48 | ​ | ​ | 2,992 | ​ | ​ | — | ​ | ​ | 1,123,821 | ​ | ​ | 1,126,861 | ​
Municipal bonds | ​ | ​ | 2,594 | ​ | ​ | 14,874 | ​ | ​ | 29,218 | ​ | ​ | 2,235 | ​ | ​ | 48,921 | ​
SBA securities | ​ | ​ | — | ​ | ​ | 418 | ​ | ​ | 388 | ​ | ​ | 8,430 | ​ | ​ | 9,236 | ​
Beneficial interests in FHLMC securitization | ​ | ​ | — | ​ | ​ | 4,619 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 4,619 | ​
Corporate bonds | ​ | ​ | — | ​ | ​ | 61,961 | ​ | ​ | 66,282 | ​ | ​ | 5,524 | ​ | ​ | 133,767 | ​
U.S. Treasury | ​ |  | 200 | ​ |  | 500 | ​ |  | — | ​ |  | — | ​ |  | 700 | ​
Total | ​ | $ | 2,842 | ​ | $ | 85,640 | ​ | $ | 96,042 | ​ | $ | 1,150,701 | ​ | $ | 1,335,225 | ​
Weighted average yield | ​ |  | 1.99 | % |  | 5.83 | % |  | 3.01 | % |  | 5.50 | % |  | 5.34 | %
Estimated Fair Value: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​
Collateralized mortgage obligations | ​ | $ | — | ​ | $ | 256 | ​ | $ | 150 | ​ | $ | 9,436 | ​ | $ | 9,842 | ​
Agency mortgage-backed securities | ​ | ​ | 47 | ​ | ​ | 2,882 | ​ | ​ | — | ​ | ​ | 1,118,697 | ​ | ​ | 1,121,626 | ​
Municipal bonds | ​ | ​ | 2,573 | ​ | ​ | 14,120 | ​ | ​ | 27,065 | ​ | ​ | 1,777 | ​ | ​ | 45,535 | ​
SBA securities | ​ | ​ | — | ​ | ​ | 416 | ​ | ​ | 388 | ​ | ​ | 8,341 | ​ | ​ | 9,145 | ​
Beneficial interests in FHLMC securitization | ​ | ​ | — | ​ | ​ | 4,619 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 4,619 | ​
Corporate bonds | ​ | ​ | — | ​ | ​ | 60,318 | ​ | ​ | 61,889 | ​ | ​ | 4,367 | ​ | ​ | 126,574 | ​
U.S. Treasury | ​ |  | 200 | ​ |  | 478 | ​ |  | — | ​ |  | — | ​ |  | 678 | ​
Total | ​ | $ | 2,820 | ​ | $ | 83,089 | ​ | $ | 89,492 | ​ | $ | 1,142,618 | ​ | $ | 1,318,019 | ​
Schedule of Maturities of Securities HTM | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 1 Year or |  | More than 1 Year |  | More than 5 Years |  | More than |  | ​ | ​ |
(dollars in thousands) | ​ | Less | ​ | through 5 Years | ​ | through 10 Years | ​ | 10 Years | ​ | Total |
September 30, 2025 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Amortized Cost: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  | ​
Agency mortgage-backed securities | ​ | $ | — | ​ | $ | 5,430 | ​ | $ | 8,279 | ​ | $ | 633,910 | ​ | $ | 647,619 | ​
Total | ​ | $ | — | ​ | $ | 5,430 | ​ | $ | 8,279 | ​ | $ | 633,910 | ​ | $ | 647,619 | ​
Weighted average yield | ​ |  | — | % |  | 1.09 | % | ​ | 1.65 | % |  | 2.46 | % | ​ | 2.44 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Estimated Fair Value: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​
Agency mortgage-backed securities | ​ | $ | — | ​ | $ | 5,201 | ​ | $ | 7,700 | ​ | $ | 584,393 | ​ | $ | 597,294 | ​
Total | ​ | $ | — | ​ | $ | 5,201 | ​ | $ | 7,700 | ​ | $ | 584,393 | ​ | $ | 597,294 | ​
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 1 Year or |  | More than 1 Year |  | More than 5 Years |  | More than |  | ​ | ​ |
(dollars in thousands) | ​ | Less | ​ | through 5 Years | ​ | through 10 Years | ​ | 10 Years | ​ | Total |
December 31, 2024 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Amortized Cost: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  | ​
Agency mortgage-backed securities | ​ | $ | — | ​ | $ | 4,542 | ​ | $ | 8,900 | ​ | $ | 698,663 | ​ | $ | 712,105 | ​
Total | ​ | $ | — | ​ | $ | 4,542 | ​ | $ | 8,900 | ​ | $ | 698,663 | ​ | $ | 712,105 | ​
Weighted average yield | ​ |  | — | % |  | 0.99 | % |  | 1.58 | % |  | 2.24 | % | ​ | 2.22 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Estimated Fair Value: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​
Agency mortgage-backed securities | ​ | $ | — | ​ | $ | 4,287 | ​ | $ | 8,128 | ​ | $ | 624,425 | ​ | $ | 636,840 | ​
Total | ​ | $ | — | ​ | $ | 4,287 | ​ | $ | 8,128 | ​ | $ | 624,425 | ​ | $ | 636,840 | ​
​

X
- Definition Tabular disclosure of the reconciliation of held to maturity securities from cost basis to fair value. + References No definition available. + Details
Name: | ffwm_ScheduleOfHeldToMaturitySecuritiesReconciliationTableTextBlock
Namespace Prefix: | ffwm_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of investments in an unrealized loss position for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), including: (a) the aggregate related fair value of investments with unrealized losses, (b) the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value). + References No definition available. + Details
Name: | ffwm_ScheduleOfSecuritiesInContinuousUnrealizedLossPositionAggregatedByInvestmentCategoryAndLengthOfTimeTableTextBlock
Namespace Prefix: | ffwm_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479106/326-30-50-9 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-9 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-3 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (aa) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (aaa) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-3 Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-3 Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-3 Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-3 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of information about investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5B -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5B Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (aaa) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5 Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5 Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5 Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5 Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5 Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5 Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5A Reference 13: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5A Reference 14: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5A -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5A Reference 15: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5B Reference 16: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5B Reference 17: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5B -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5B Reference 18: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5B -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5B + Details
Name: | us-gaap_HeldToMaturitySecuritiesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
Name: | us-gaap_ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration