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Investment Securities (Tables) | 6 Months Ended
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Jun. 30, 2026
Investments, Debt and Equity Securities [Abstract] |
Schedule of Investment in AFS and HTM Securities | The table below summarizes the Company's investment in AFS securities by major security type.
|  | As of June 30, 2026
(dollars in thousands) |  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  |  |  | Estimated Fair Value
U.S. agency securities |  | $ | 331,363 |  |  | $ | — |  |  | $ | (17,591) |  |  |  |  | $ | 313,772 |
Residential mortgage-backed securities |  | 574,550 |  |  | 58 |  |  | (59,860) |  |  |  |  | 514,748 |
Commercial mortgage-backed securities |  | 68,359 |  |  | — |  |  | (2,625) |  |  |  |  | 65,734 |
Municipal bonds |  | 8,335 |  |  | — |  |  | (392) |  |  |  |  | 7,943 |
Corporate bonds |  | 2,000 |  |  | — |  |  | (14) |  |  |  |  | 1,986 |
Total available-for-sale securities |  | $ | 984,607 |  |  | $ | 58 |  |  | $ | (80,482) |  |  |  |  | $ | 904,183 |
|  | As of December 31, 2025
(dollars in thousands) |  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  |  |  | Estimated Fair Value
U.S. agency securities |  | $ | 355,249 |  |  | $ | — |  |  | $ | (17,541) |  |  |  |  | $ | 337,708 |
Residential mortgage-backed securities |  | 620,540 |  |  | 152 |  |  | (58,188) |  |  |  |  | 562,504
Commercial mortgage-backed securities |  | 68,931 |  |  | 117 |  |  | (2,503) |  |  |  |  | 66,545
Municipal bonds |  | 8,426 |  |  | — |  |  | (380) |  |  |  |  | 8,046
Corporate bonds |  | 2,000 |  |  | — |  |  | (33) |  |  |  |  | 1,967
Total available-for-sale securities |  | $ | 1,055,146 |  |  | $ | 269 |  |  | $ | (78,645) |  |  |  |  | $ | 976,770 |
The table below summarizes the Company's investment in HTM securities by major security type.
|  | As of June 30, 2026
(dollars in thousands) |  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value
Residential mortgage-backed securities |  | $ | 516,797 |  |  | $ | — |  |  | $ | (62,731) |  |  | $ | 454,066 |
Commercial mortgage-backed securities |  | 84,682 |  |  | — |  |  | (10,409) |  |  | 74,273 |
Municipal bonds |  | 106,753 |  |  | — |  |  | (7,284) |  |  | 99,469 |
Corporate bonds |  | 107,100 |  |  | 5 |  |  | (3,919) |  |  | 103,186 |
Total |  | 815,332 |  |  | $ | 5 |  |  | $ | (84,343) |  |  | $ | 730,994 |
Less: Allowance for credit losses |  | (454) |  |  |  |  |  |  |
Total held-to-maturity securities, net of ACL |  | $ | 814,878 |  |  |  |  |  |  |
|  | As of December 31, 2025
(dollars in thousands) |  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value
Residential mortgage-backed securities |  | $ | 544,402 |  |  | $ | — |  |  | $ | (58,836) |  |  | $ | 485,566 |
Commercial mortgage-backed securities |  | 85,760 |  |  | — |  |  | (9,787) |  |  | 75,973 |
Municipal bonds |  | 106,875 |  |  | — |  |  | (6,933) |  |  | 99,942 |
Corporate bonds |  | 118,773 |  |  | 8 |  |  | (5,315) |  |  | 113,466 |
Total |  | 855,810 |  |  | $ | 8 |  |  | $ | (80,871) |  |  | $ | 774,947 |
Less: Allowance for credit losses |  | (1,030) |  |  |  |  |  |  |
Total held-to-maturity securities, net of ACL |  | $ | 854,780 |  |  |  |  |  |  |
Schedule of Continuous Unrealized Loss on AFS and HTM Securities | The table below summarizes, by length of time, the Company's AFS securities that have been in a continuous unrealized loss position and HTM securities that have been in a continuous unrecognized loss position.
|  | As of June 30, 2026
|  |  |  | Less than 12 Months |  | 12 Months or Greater |  | Total
(dollars in thousands) |  | Number of Securities |  | Estimated Fair Value |  | Unrealized Losses |  | Estimated Fair Value |  | Unrealized Losses |  | Estimated Fair Value |  | Unrealized Losses
Investment securities available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. agency securities |  | 50 |  |  | $ | — |  |  | $ | — |  |  | $ | 313,772 |  |  | $ | (17,591) |  |  | $ | 313,772 |  |  | $ | (17,591) |
Residential mortgage-backed securities |  | 140 |  |  | 16,642 |  |  | (227) |  |  | 489,180 |  |  | (59,633) |  |  | 505,822 |  |  | (59,860) |
Commercial mortgage-backed securities |  | 12 |  |  | 28,805 |  |  | (198) |  |  | 36,929 |  |  | (2,427) |  |  | 65,734 |  |  | (2,625) |
Municipal bonds |  | 1 |  |  | — |  |  | — |  |  | 7,943 |  |  | (392) |  |  | 7,943 |  |  | (392) |
Corporate bonds |  | 1 |  |  | — |  |  | — |  |  | 1,986 |  |  | (14) |  |  | 1,986 |  |  | (14) |
Total |  | 204 |  |  | $ | 45,447 |  |  | $ | (425) |  |  | $ | 849,810 |  |  | $ | (80,057) |  |  | $ | 895,257 |  |  | $ | (80,482) |
Investment securities held-to-maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential mortgage-backed securities |  | 131 |  |  | $ | — |  |  | $ | — |  |  | $ | 454,066 |  |  | $ | (62,731) |  |  | $ | 454,066 |  |  | $ | (62,731) |
Commercial mortgage-backed securities |  | 16 |  |  | 4,190 |  |  | (559) |  |  | 70,083 |  |  | (9,850) |  |  | 74,273 |  |  | (10,409) |
Municipal bonds |  | 33 |  |  | — |  |  | — |  |  | 98,469 |  |  | (7,284) |  |  | 98,469 |  |  | (7,284) |
Corporate bonds |  | 25 |  |  | 5,875 |  |  | (47) |  |  | 92,348 |  |  | (3,872) |  |  | 98,223 |  |  | (3,919) |
Total |  | 205 |  |  | $ | 10,065 |  |  | $ | (606) |  |  | $ | 714,966 |  |  | $ | (83,737) |  |  | $ | 725,031 |  |  | $ | (84,343) |
|  | As of December 31, 2025
|  |  |  | Less than 12 Months |  | 12 Months or Greater |  | Total
(dollars in thousands) |  | Number of Securities |  | Estimated Fair Value |  | Unrealized Losses |  | Estimated Fair Value |  | Unrealized Losses |  | Estimated Fair Value |  | Unrealized Losses
Investment securities available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. agency securities |  | 52 |  |  | $ | — |  |  | $ | — |  |  | $ | 337,708 |  |  | $ | (17,541) |  |  | $ | 337,708 |  |  | $ | (17,541) |
Residential mortgage-backed securities |  | 139 |  |  | — |  |  | — |  |  | 546,514 |  |  | (58,188) |  |  | 546,514 |  |  | (58,188) |
Commercial mortgage-backed securities |  | 10 |  |  | — |  |  | — |  |  | 37,329 |  |  | (2,503) |  |  | 37,329 |  |  | (2,503) |
Municipal bonds |  | 1 |  |  | — |  |  | — |  |  | 8,046 |  |  | (380) |  |  | 8,046 |  |  | (380) |
Corporate bonds |  | 1 |  |  | — |  |  | — |  |  | 1,967 |  |  | (33) |  |  | 1,967 |  |  | (33) |
Total |  | 203 |  | $ | — |  |  | $ | — |  |  | $ | 931,564 |  |  | $ | (78,645) |  |  | $ | 931,564 |  |  | $ | (78,645) |
Investment securities held-to-maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential mortgage-backed securities |  | 136 |  |  | $ | — |  |  | $ | — |  |  | $ | 485,567 |  |  | $ | (58,836) |  |  | $ | 485,567 |  |  | $ | (58,836) |
Commercial mortgage-backed securities |  | 16 |  |  | 4,271 |  |  | (503) |  |  | 71,702 |  |  | (9,284) |  |  | 75,973 |  |  | (9,787) |
Municipal bonds |  | 33 |  |  | — |  |  | — |  |  | 98,942 |  |  | (6,933) |  |  | 98,942 |  |  | (6,933) |
Corporate bonds |  | 27 |  |  | 1,922 |  |  | (18) |  |  | 106,638 |  |  | (5,297) |  |  | 108,560 |  |  | (5,315) |
Total |  | 212 |  | $ | 6,193 |  |  | $ | (521) |  |  | $ | 762,849 |  |  | $ | (80,350) |  |  | $ | 769,042 |  |  | $ | (80,871) |
Schedule of Investment in AFS Securities and HTM Securities by Contractual Maturity | The table below summarizes the Company's investment in AFS securities and HTM securities by contractual maturity. Expected maturities for mortgage-backed securities ("MBS") will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.
|  | As of June 30, 2026
(dollars in thousands) |  | Amortized Cost |  | Estimated Fair Value
Investment securities available-for-sale: |  |  |  |
Within one year |  | $ | 70,524 |  |  | $ | 69,832 |
One to five years |  | 235,827 |  |  | 221,497 |
Five to ten years |  | 17,450 |  |  | 16,523 |
Beyond ten years |  | 17,897 |  |  | 15,849 |
Residential mortgage-backed securities |  | 574,550 |  |  | 514,748 |
Commercial mortgage-backed securities |  | 68,359 |  |  | 65,734 |
Less: allowance for credit losses |  | — |  |  | — |
Total investment securities available-for-sale |  | 984,607 |  |  | 904,183 |
Investment securities held-to-maturity: |  |  |  |
Within one year |  | 11,972 |  |  | 11,906 |
One to five years |  | 70,858 |  |  | 68,659 |
Five to ten years |  | 80,146 |  |  | 75,368 |
Beyond ten years |  | 50,877 |  |  | 46,722 |
Residential mortgage-backed securities: |  | 516,797 |  |  | 454,066 |
Commercial mortgage-backed securities |  | 84,682 |  |  | 74,273 |
Less: allowance for credit losses |  | (454) |  |  | — |
Total investment securities held-to-maturity |  | 814,878 |  |  | 730,994 |
Total |  | $ | 1,799,485 |  |  | $ | 1,635,177 |
Schedule of Information About the Sales and Calls of Investment Securities | The table below displays information about the sales and calls of our investment securities.
|  | For the Three Months Ended June 30, |  | For the Six Months Ended June 30,
(dollars in thousands) |  | 2026 |  | 2025 |  | 2026 |  | 2025 |  |
Proceeds from sales and calls |  | $ | 12,055 |  |  | $ | 62,909 |  |  | $ | 12,112 |  |  | $ | 112,961 |  |  |
Gross realized gains from sales and calls |  | 266 |  |  | 3 |  |  | 269 |  |  | 8 |  |  |
Gross realized losses from sales and calls |  | — |  |  | 1,857 |  |  | — |  |  | 1,858 |  |  |

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