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Securities - Contractual Maturity (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Amortized Cost |  |
Due within one year | $ 0 |
Due after one year through five years | 7,705 |
Due after five years through ten years | 112,024 |
Due after ten years | 224,348 |
Amortized Cost | 1,199,143 | $ 1,221,496
Fair Value |  |
Due within one year | 0 |
Due after one year through five years | 7,249 |
Due after five years through ten years | 99,428 |
Due after ten years | 195,245 |
Fair Value | 1,085,085 | 1,121,830
Amortized Cost |  |
Due within one year | 2,274 |
Due after one year through five years | 35,762 |
Due after five years through ten years | 38,877 |
Due after ten years | 52,283 |
Amortized Cost | 910,048 | 1,062,649
Fair Value |  |
Due within one year | 2,231 |
Due after one year through five years | 36,003 |
Due after five years through ten years | 34,712 |
Due after ten years | 51,365 |
Fair Value | 764,486 | 923,279
Residential mortgage backed securities: |  |
Amortized Cost |  |
Amortized Cost | 379,244 | 387,208
Fair Value |  |
Fair Value | 342,273 | 355,538
Other debt securities |  |
Amortized Cost |  |
Without single maturity date, amortized cost | 0 |
Amortized Cost | 56,822 | 58,373
Fair Value |  |
Without single maturity date, fair value | 0 |
Fair Value | 52,166 | 54,254
Amortized Cost |  |
Debt securities, without fixed maturity, amortized cost | 7,708 |
Amortized Cost | 115,235 | 72,383
Fair Value |  |
Debt securities, without fixed maturity, fair value | 6,839 |
Fair Value | 111,387 | 68,034
Government agency mortgage backed securities | Residential mortgage backed securities: |  |
Amortized Cost |  |
Without single maturity date, amortized cost | 414,485 |
Amortized Cost | 414,485 | 426,264
Fair Value |  |
Without single maturity date, fair value | 390,020 |
Fair Value | 390,020 | 405,950
Amortized Cost |  |
Debt securities, without fixed maturity, amortized cost | 198,253 |
Amortized Cost | 198,253 | 301,400
Fair Value |  |
Debt securities, without fixed maturity, fair value | 172,279 |
Fair Value | 172,279 | 276,604
Government agency mortgage backed securities | Commercial mortgage backed securities: |  |
Amortized Cost |  |
Without single maturity date, amortized cost | 16,977 |
Amortized Cost | 16,977 | 16,983
Fair Value |  |
Without single maturity date, fair value | 13,921 |
Fair Value | 13,921 | 14,011
Amortized Cost |  |
Debt securities, without fixed maturity, amortized cost | 6,023 |
Amortized Cost | 6,023 | 6,029
Fair Value |  |
Debt securities, without fixed maturity, fair value | 5,344 |
Fair Value | 5,344 | 5,392
Government agency collateralized mortgage obligations | Residential mortgage backed securities: |  |
Amortized Cost |  |
Without single maturity date, amortized cost | 379,244 |
Fair Value |  |
Without single maturity date, fair value | 342,273 |
Amortized Cost |  |
Debt securities, without fixed maturity, amortized cost | 431,344 |
Amortized Cost | 431,344 | 485,164
Fair Value |  |
Debt securities, without fixed maturity, fair value | 340,891 |
Fair Value | 340,891 | 399,281
Government agency collateralized mortgage obligations | Commercial mortgage backed securities: |  |
Amortized Cost |  |
Without single maturity date, amortized cost | 44,360 |
Amortized Cost | 44,360 | 44,514
Fair Value |  |
Without single maturity date, fair value | 36,949 |
Fair Value | 36,949 | 37,537
Amortized Cost |  |
Debt securities, without fixed maturity, amortized cost | 137,524 |
Amortized Cost | 137,524 | 161,299
Fair Value |  |
Debt securities, without fixed maturity, fair value | 114,822 |
Fair Value | $ 114,822 | $ 139,358

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