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Securities - Schedule of Amortized Cost, Estimated Fair Value, and Allowance for Securities Credit Losses of Debt Securities Available-for-Sale and Held-to-Maturity (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Securities Financing Transaction [Line Items] |  |  |
Available-for-sale, amortized cost | $ 847,272 | $ 780,079 |
Available-for-sale, gross unrealized gains | 1,545 | 194 |
Available-for-sale, gross unrealized losses | (21,317) | (26,381) |
Available-for-sale, fair value | 827,500 | 753,892 |
Allowance for Securities Credit Losses | 0 | 0 |
Held-to-maturity, amortized cost | 1,046,842 | 1,160,868 |
Held-to-maturity, gross unrealized gains | 1,019 | 1,553 |
Held-to-maturity, gross unrealized losses | (94,944) | (93,983) |
Held-to-maturity, fair value | 952,917 | 1,068,438 |
Allowance for Securities Credit Losses | (967) | (1,133) | $ (1,128)
Total, amortized cost | 1,894,114 | 1,940,947 |
Total, gross unrealized gains | 2,564 | 1,747 |
Total, gross unrealized losses | (116,261) | (120,364) |
Total, estimated fair value | 1,780,417 | 1,822,330 |
U.S. government and agency obligations |  |  |
Securities Financing Transaction [Line Items] |  |  |
Available-for-sale, amortized cost | 62,396 | 66,490 |
Available-for-sale, gross unrealized gains | 11 | 0 |
Available-for-sale, gross unrealized losses | (5,022) | (5,796) |
Available-for-sale, fair value | 57,385 | 60,694 |
Allowance for Securities Credit Losses | 0 | 0 |
Corporate debt securities |  |  |
Securities Financing Transaction [Line Items] |  |  |
Available-for-sale, amortized cost | 14,042 | 10,096 |
Available-for-sale, gross unrealized gains | 43 | 11 |
Available-for-sale, gross unrealized losses | (762) | (981) |
Available-for-sale, fair value | 13,323 | 9,126 |
Allowance for Securities Credit Losses | 0 | 0 |
Held-to-maturity, amortized cost | 65,350 | 69,809 |
Held-to-maturity, gross unrealized gains | 775 | 391 |
Held-to-maturity, gross unrealized losses | (1,416) | (3,941) |
Held-to-maturity, fair value | 64,709 | 66,259 |
Allowance for Securities Credit Losses | (734) | (987) |
Asset-backed securities |  |  |
Securities Financing Transaction [Line Items] |  |  |
Available-for-sale, amortized cost | 197,116 | 295,796 |
Available-for-sale, gross unrealized gains | 235 | 0 |
Available-for-sale, gross unrealized losses | (84) | (4,252) |
Available-for-sale, fair value | 197,267 | 291,544 |
Allowance for Securities Credit Losses | 0 | 0 |
Agency residential |  |  |
Securities Financing Transaction [Line Items] |  |  |
Available-for-sale, amortized cost | 465,108 | 298,107 |
Available-for-sale, gross unrealized gains | 1,256 | 183 |
Available-for-sale, gross unrealized losses | (801) | (97) |
Available-for-sale, fair value | 465,563 | 298,193 |
Allowance for Securities Credit Losses | 0 | 0 |
Held-to-maturity, amortized cost | 680,052 | 765,632 |
Held-to-maturity, gross unrealized gains | 44 | 901 |
Held-to-maturity, gross unrealized losses | (73,110) | (70,040) |
Held-to-maturity, fair value | 606,986 | 696,493 |
Allowance for Securities Credit Losses | 0 | 0 |
Agency commercial |  |  |
Securities Financing Transaction [Line Items] |  |  |
Available-for-sale, amortized cost | 108,610 | 109,590 |
Available-for-sale, gross unrealized gains | 0 | 0 |
Available-for-sale, gross unrealized losses | (14,648) | (15,255) |
Available-for-sale, fair value | 93,962 | 94,335 |
Allowance for Securities Credit Losses | 0 | 0 |
Held-to-maturity, amortized cost | 79,925 | 82,734 |
Held-to-maturity, gross unrealized gains | 1 | 10 |
Held-to-maturity, gross unrealized losses | (5,878) | (3,678) |
Held-to-maturity, fair value | 74,048 | 79,066 |
Allowance for Securities Credit Losses | 0 | 0 |
State and municipal debt obligations |  |  |
Securities Financing Transaction [Line Items] |  |  |
Held-to-maturity, amortized cost | 201,369 | 222,009 |
Held-to-maturity, gross unrealized gains | 199 | 251 |
Held-to-maturity, gross unrealized losses | (13,665) | (14,550) |
Held-to-maturity, fair value | 187,903 | 207,710 |
Allowance for Securities Credit Losses | (31) | (39) |
Non-agency commercial |  |  |
Securities Financing Transaction [Line Items] |  |  |
Held-to-maturity, amortized cost | 20,146 | 20,684 |
Held-to-maturity, gross unrealized gains | 0 | 0 |
Held-to-maturity, gross unrealized losses | (875) | (1,774) |
Held-to-maturity, fair value | 19,271 | 18,910 |
Allowance for Securities Credit Losses | (202) | (107) |
Total mortgage-backed securities |  |  |
Securities Financing Transaction [Line Items] |  |  |
Available-for-sale, amortized cost | 573,718 | 407,697 |
Available-for-sale, gross unrealized gains | 1,256 | 183 |
Available-for-sale, gross unrealized losses | (15,449) | (15,352) |
Available-for-sale, fair value | 559,525 | 392,528 |
Allowance for Securities Credit Losses | 0 | 0 |
Held-to-maturity, amortized cost | 780,123 | 869,050 |
Held-to-maturity, gross unrealized gains | 45 | 911 |
Held-to-maturity, gross unrealized losses | (79,863) | (75,492) |
Held-to-maturity, fair value | 700,305 | 794,469 |
Allowance for Securities Credit Losses | $ (202) | $ (107) |

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