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Securities - Contractual Maturity (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Amortized Cost |  |
Due within one year | $ 1,308 |
Due after one year through five years | 6,268 |
Due after five years through ten years | 139,202 |
Due after ten years | 193,104 |
Amortized Cost | 1,150,563 | $ 1,221,496
Fair Value |  |
Due within one year | 1,293 |
Due after one year through five years | 5,963 |
Due after five years through ten years | 125,714 |
Due after ten years | 169,511 |
Fair Value | 1,068,968 | 1,121,830
Amortized Cost |  |
Due within one year | 998 |
Due after one year through five years | 42,107 |
Due after five years through ten years | 35,012 |
Due after ten years | 50,312 |
Amortized Cost | 878,445 | 1,062,649
Fair Value |  |
Due within one year | 1,046 |
Due after one year through five years | 42,171 |
Due after five years through ten years | 32,414 |
Due after ten years | 49,462 |
Fair Value | 764,844 | 923,279
Residential mortgage backed securities: |  |
Amortized Cost |  |
Amortized Cost | 363,095 | 387,208
Fair Value |  |
Fair Value | 339,359 | 355,538
Other debt securities |  |
Amortized Cost |  |
Without single maturity date, amortized cost | 0 |
Amortized Cost | 54,432 | 58,373
Fair Value |  |
Without single maturity date, fair value | 0 |
Fair Value | 51,854 | 54,254
Amortized Cost |  |
Debt securities, without fixed maturity, amortized cost | 6,518 |
Amortized Cost | 114,637 | 72,383
Fair Value |  |
Debt securities, without fixed maturity, fair value | 6,035 |
Fair Value | 112,566 | 68,034
Government agency mortgage backed securities | Residential mortgage backed securities: |  |
Amortized Cost |  |
Without single maturity date, amortized cost | 386,654 |
Amortized Cost | 386,654 | 426,264
Fair Value |  |
Without single maturity date, fair value | 374,926 |
Fair Value | 374,926 | 405,950
Amortized Cost |  |
Debt securities, without fixed maturity, amortized cost | 191,650 |
Amortized Cost | 191,650 | 301,400
Fair Value |  |
Debt securities, without fixed maturity, fair value | 172,847 |
Fair Value | 172,847 | 276,604
Government agency mortgage backed securities | Commercial mortgage backed securities: |  |
Amortized Cost |  |
Without single maturity date, amortized cost | 16,966 |
Amortized Cost | 16,966 | 16,983
Fair Value |  |
Without single maturity date, fair value | 14,562 |
Fair Value | 14,562 | 14,011
Amortized Cost |  |
Debt securities, without fixed maturity, amortized cost | 6,010 |
Amortized Cost | 6,010 | 6,029
Fair Value |  |
Debt securities, without fixed maturity, fair value | 5,544 |
Fair Value | 5,544 | 5,392
Government agency collateralized mortgage obligations | Residential mortgage backed securities: |  |
Amortized Cost |  |
Without single maturity date, amortized cost | 363,095 |
Fair Value |  |
Without single maturity date, fair value | 339,359 |
Amortized Cost |  |
Debt securities, without fixed maturity, amortized cost | 408,364 |
Amortized Cost | 408,364 | 485,164
Fair Value |  |
Debt securities, without fixed maturity, fair value | 336,883 |
Fair Value | 336,883 | 399,281
Government agency collateralized mortgage obligations | Commercial mortgage backed securities: |  |
Amortized Cost |  |
Without single maturity date, amortized cost | 43,966 |
Amortized Cost | 43,966 | 44,514
Fair Value |  |
Without single maturity date, fair value | 37,640 |
Fair Value | 37,640 | 37,537
Amortized Cost |  |
Debt securities, without fixed maturity, amortized cost | 137,474 |
Amortized Cost | 137,474 | 161,299
Fair Value |  |
Debt securities, without fixed maturity, fair value | 118,442 |
Fair Value | $ 118,442 | $ 139,358

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