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v3.24.3

Securities (Summary of Book Values and Fair Values of Investment Securities) (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Fair Value |  |
Amortized Cost | $ 2,238,996 | $ 2,590,099
Fair Value | 1,907,458 | 2,189,379
Unrealized gains | 39 | 30
Unrealized (losses) | (331,577) | (400,750)
Securities held to maturity: |  |
Amortized Cost | 521,801 | 533,678
Fair Value | 448,300 | 449,623
Unrealized gains | 29 | 39
Unrealized (losses) | (73,530) | (84,094)
U.S. Treasuries |  |
Fair Value |  |
Amortized Cost | 0 | 174,785
Fair Value | 0 | 172,570
Unrealized gains | 0 | 0
Unrealized (losses) | 0 | (2,215)
Government-sponsored enterprise securities |  |
Fair Value |  |
Amortized Cost | 71,968 | 71,964
Fair Value | 62,872 | 60,266
Unrealized gains | 0 | 0
Unrealized (losses) | (9,096) | (11,698)
Mortgage-backed securities |  |
Fair Value |  |
Amortized Cost | 2,150,849 | 2,323,674
Fair Value | 1,828,802 | 1,937,784
Unrealized gains | 39 | 30
Unrealized (losses) | (322,086) | (385,920)
Securities held to maturity: |  |
Amortized Cost | 9,923 | 12,085
Fair Value | 9,564 | 11,447
Unrealized gains | 0 | 0
Unrealized (losses) | (359) | (638)
Corporate bonds |  |
Fair Value |  |
Amortized Cost | 16,179 | 19,676
Fair Value | 15,784 | 18,759
Unrealized gains | 0 | 0
Unrealized (losses) | (395) | (917)
State and local governments |  |
Securities held to maturity: |  |
Amortized Cost | 511,878 | 521,593
Fair Value | 438,736 | 438,176
Unrealized gains | 29 | 39
Unrealized (losses) | $ (73,171) | $ (83,456)

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