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Securities - Schedule of Estimated Fair Value and Unrealized Losses for Debt Securities Available-for-Sale and Held-to-Maturity (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
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Debt securities available-for-sale: |  |
Available-for-sale, Less than 12 months, Estimated Fair Value | $ 537,618 | $ 242,563
Available-for-sale, Less than 12 months, Unrealized Losses | (4,670) | (877)
Available-for-sale, 12 months or Longer, Estimated Fair Value | 219,387 | 208,677
Available-for-sale, 12 months or longer, Unrealized Losses | (13,361) | (20,440)
Available-for-sale, Total, Estimated Fair Value | 757,005 | 451,240
Available-for-sale, Total, Unrealized Losses | (18,031) | (21,317)
Debt securities held-to-maturity: |  |
Held-to-maturity, Less than 12 months, Estimated Fair Value | 6,893 | 126,796
Held-to-maturity, Less than 12 months, Unrealized Losses | (759) | (2,062)
Held-to-maturity, 12 months or longer, Estimated Fair Value | 706,144 | 763,982
Held-to-maturity, 12 months or longer, Unrealized Losses | (65,282) | (92,882)
Held-to-maturity, Total, Estimated Fair Value | 713,037 | 890,778
Held-to-maturity, Total, Unrealized Losses | (66,041) | (94,944)
Total securities, Less than 12 months, Estimated Fair Value | 544,511 | 369,359
Total securities, Less than 12 months, Unrealized Losses | (5,429) | (2,939)
Total securities, 12 months or longer, Estimated Fair Value | 925,531 | 972,659
Total securities, 12 months or longer, Unrealized Losses | (78,643) | (113,322)
Total securities, Estimated Fair Value | 1,470,042 | 1,342,018
Total securities, Unrealized Losses | (84,072) | (116,261)
Portfolio layer fair value hedge basis adjustments | (341) |
U.S. government and agency obligations | Investment securities |  |
Debt securities available-for-sale: |  |
Available-for-sale, Less than 12 months, Estimated Fair Value | 0 | 3,221
Available-for-sale, Less than 12 months, Unrealized Losses | 0 | 0
Available-for-sale, 12 months or Longer, Estimated Fair Value | 52,101 | 49,538
Available-for-sale, 12 months or longer, Unrealized Losses | (3,092) | (5,022)
Available-for-sale, Total, Estimated Fair Value | 52,101 | 52,759
Available-for-sale, Total, Unrealized Losses | (3,092) | (5,022)
Corporate debt securities |  |
Debt securities held-to-maturity: |  |
Held-to-maturity, Total, Unrealized Losses | (1,271) | (1,416)
Corporate debt securities | Investment securities |  |
Debt securities available-for-sale: |  |
Available-for-sale, Less than 12 months, Estimated Fair Value | 2,499 | 4,793
Available-for-sale, Less than 12 months, Unrealized Losses | (1) | (55)
Available-for-sale, 12 months or Longer, Estimated Fair Value | 4,731 | 6,029
Available-for-sale, 12 months or longer, Unrealized Losses | (268) | (707)
Available-for-sale, Total, Estimated Fair Value | 7,230 | 10,822
Available-for-sale, Total, Unrealized Losses | (269) | (762)
Debt securities held-to-maturity: |  |
Held-to-maturity, Less than 12 months, Estimated Fair Value | 2,864 | 1,247
Held-to-maturity, Less than 12 months, Unrealized Losses | (754) | (219)
Held-to-maturity, 12 months or longer, Estimated Fair Value | 18,867 | 25,518
Held-to-maturity, 12 months or longer, Unrealized Losses | (517) | (1,197)
Held-to-maturity, Total, Estimated Fair Value | 21,731 | 26,765
Held-to-maturity, Total, Unrealized Losses | (1,271) | (1,416)
Asset-backed securities | Investment securities |  |
Debt securities available-for-sale: |  |
Available-for-sale, Less than 12 months, Estimated Fair Value | 26,067 | 31,588
Available-for-sale, Less than 12 months, Unrealized Losses | (27) | (21)
Available-for-sale, 12 months or Longer, Estimated Fair Value | 0 | 59,148
Available-for-sale, 12 months or longer, Unrealized Losses | 0 | (63)
Available-for-sale, Total, Estimated Fair Value | 26,067 | 90,736
Available-for-sale, Total, Unrealized Losses | (27) | (84)
Mortgage-backed securities: |  |
Debt securities available-for-sale: |  |
Available-for-sale, Less than 12 months, Estimated Fair Value | 509,052 | 202,961
Available-for-sale, Less than 12 months, Unrealized Losses | (4,642) | (801)
Available-for-sale, 12 months or Longer, Estimated Fair Value | 162,555 | 93,962
Available-for-sale, 12 months or longer, Unrealized Losses | (10,001) | (14,648)
Available-for-sale, Total, Estimated Fair Value | 671,607 | 296,923
Available-for-sale, Total, Unrealized Losses | (14,643) | (15,449)
Debt securities held-to-maturity: |  |
Held-to-maturity, Less than 12 months, Estimated Fair Value | 2,543 | 118,451
Held-to-maturity, Less than 12 months, Unrealized Losses | 0 | (1,667)
Held-to-maturity, 12 months or longer, Estimated Fair Value | 543,087 | 569,030
Held-to-maturity, 12 months or longer, Unrealized Losses | (54,550) | (78,196)
Held-to-maturity, Total, Estimated Fair Value | 545,630 | 687,481
Held-to-maturity, Total, Unrealized Losses | (54,550) | (79,863)
Mortgage-backed securities: | Agency residential |  |
Debt securities available-for-sale: |  |
Available-for-sale, Less than 12 months, Estimated Fair Value | 508,559 | 202,961
Available-for-sale, Less than 12 months, Unrealized Losses | (4,641) | (801)
Available-for-sale, 12 months or Longer, Estimated Fair Value | 64,646 | 0
Available-for-sale, 12 months or longer, Unrealized Losses | (71) | 0
Available-for-sale, Total, Estimated Fair Value | 573,205 | 202,961
Available-for-sale, Total, Unrealized Losses | (4,712) | (801)
Debt securities held-to-maturity: |  |
Held-to-maturity, Less than 12 months, Estimated Fair Value | 2,365 | 114,557
Held-to-maturity, Less than 12 months, Unrealized Losses | 0 | (1,647)
Held-to-maturity, 12 months or longer, Estimated Fair Value | 463,352 | 479,847
Held-to-maturity, 12 months or longer, Unrealized Losses | (48,937) | (71,463)
Held-to-maturity, Total, Estimated Fair Value | 465,717 | 594,404
Held-to-maturity, Total, Unrealized Losses | (48,937) | (73,110)
Mortgage-backed securities: | Agency commercial |  |
Debt securities available-for-sale: |  |
Available-for-sale, Less than 12 months, Estimated Fair Value | 493 | 0
Available-for-sale, Less than 12 months, Unrealized Losses | (1) | 0
Available-for-sale, 12 months or Longer, Estimated Fair Value | 97,909 | 93,962
Available-for-sale, 12 months or longer, Unrealized Losses | (9,930) | (14,648)
Available-for-sale, Total, Estimated Fair Value | 98,402 | 93,962
Available-for-sale, Total, Unrealized Losses | (9,931) | (14,648)
Debt securities held-to-maturity: |  |
Held-to-maturity, Less than 12 months, Estimated Fair Value | 178 | 3,894
Held-to-maturity, Less than 12 months, Unrealized Losses | 0 | (20)
Held-to-maturity, 12 months or longer, Estimated Fair Value | 71,950 | 69,912
Held-to-maturity, 12 months or longer, Unrealized Losses | (5,383) | (5,858)
Held-to-maturity, Total, Estimated Fair Value | 72,128 | 73,806
Held-to-maturity, Total, Unrealized Losses | (5,383) | (5,878)
Mortgage-backed securities: | Non-agency commercial |  |
Debt securities held-to-maturity: |  |
Held-to-maturity, Less than 12 months, Estimated Fair Value | 0 | 0
Held-to-maturity, Less than 12 months, Unrealized Losses | 0 | 0
Held-to-maturity, 12 months or longer, Estimated Fair Value | 7,785 | 19,271
Held-to-maturity, 12 months or longer, Unrealized Losses | (230) | (875)
Held-to-maturity, Total, Estimated Fair Value | 7,785 | 19,271
Held-to-maturity, Total, Unrealized Losses | (230) | (875)
State and municipal debt obligations |  |
Debt securities held-to-maturity: |  |
Held-to-maturity, Total, Unrealized Losses | (10,220) | (13,665)
State and municipal debt obligations | Investment securities |  |
Debt securities held-to-maturity: |  |
Held-to-maturity, Less than 12 months, Estimated Fair Value | 1,486 | 7,098
Held-to-maturity, Less than 12 months, Unrealized Losses | (5) | (176)
Held-to-maturity, 12 months or longer, Estimated Fair Value | 144,190 | 169,434
Held-to-maturity, 12 months or longer, Unrealized Losses | (10,215) | (13,489)
Held-to-maturity, Total, Estimated Fair Value | 145,676 | 176,532
Held-to-maturity, Total, Unrealized Losses | $ (10,220) | $ (13,665)

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