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v3.24.3

Securities, Held to Maturity (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Held-to-maturity securities, fair value to amortized cost [Abstract] |  |  |  |  |
Amortized cost | $ 854,941 |  | $ 854,941 |  | $ 905,267
Unrealized gains | 255 |  | 255 |  | 271
Unrealized losses | (73,328) |  | (73,328) |  | (91,014)
Estimated fair value | 781,868 |  | 781,868 |  | 814,524
Transactions of HTM securities [Abstract] |  |  |  |  |
Gains from calls on HTM securities | 0 | $ 0 | 0 | $ 0 |
Asset Pledged as Collateral [Member] | Public Deposits or Other Purposes [Member] |  |  |  |  |
Securities pledged [Abstract] |  |  |  |  |
AFS and HTM securities | 1,880,000 |  | 1,880,000 |  | 2,030,000
Asset Pledged as Collateral [Member] | Securities Sold under Repurchase Agreements [Member] |  |  |  |  |
Securities pledged [Abstract] |  |  |  |  |
AFS and HTM securities | 190,700 |  | 190,700 |  | 177,200
Federal Agency [Member] |  |  |  |  |
Held-to-maturity securities, fair value to amortized cost [Abstract] |  |  |  |  |
Amortized cost | 100,000 |  | 100,000 |  | 100,000
Unrealized gains | 0 |  | 0 |  | 0
Unrealized losses | (14,264) |  | (14,264) |  | (17,784)
Estimated fair value | 85,736 |  | 85,736 |  | 82,216
Mortgage-Backed, Government Sponsored Enterprises [Member] |  |  |  |  |
Held-to-maturity securities, fair value to amortized cost [Abstract] |  |  |  |  |
Amortized cost | 213,569 |  | 213,569 |  | 228,720
Unrealized gains | 0 |  | 0 |  | 0
Unrealized losses | (26,732) |  | (26,732) |  | (31,613)
Estimated fair value | 186,837 |  | 186,837 |  | 197,107
Mortgage-Backed, U.S. Government Agency Securities [Member] |  |  |  |  |
Held-to-maturity securities, fair value to amortized cost [Abstract] |  |  |  |  |
Amortized cost | 15,616 |  | 15,616 |  | 17,086
Unrealized gains | 2 |  | 2 |  | 3
Unrealized losses | (139) |  | (139) |  | (566)
Estimated fair value | 15,479 |  | 15,479 |  | 16,523
Collateralized Mortgage Obligations, Government-Sponsored Enterprises [Member] |  |  |  |  |
Held-to-maturity securities, fair value to amortized cost [Abstract] |  |  |  |  |
Amortized cost | 172,596 |  | 172,596 |  | 187,457
Unrealized gains | 84 |  | 84 |  | 57
Unrealized losses | (8,240) |  | (8,240) |  | (12,021)
Estimated fair value | 164,440 |  | 164,440 |  | 175,493
Collateralized Mortgage Obligations, U.S. Government Agency Securities [Member] |  |  |  |  |
Held-to-maturity securities, fair value to amortized cost [Abstract] |  |  |  |  |
Amortized cost | 61,657 |  | 61,657 |  | 63,878
Unrealized gains | 0 |  | 0 |  | 0
Unrealized losses | (9,481) |  | (9,481) |  | (10,908)
Estimated fair value | 52,176 |  | 52,176 |  | 52,970
State & Municipal [Member] |  |  |  |  |
Held-to-maturity securities, fair value to amortized cost [Abstract] |  |  |  |  |
Amortized cost | 291,503 |  | 291,503 |  | 308,126
Unrealized gains | 169 |  | 169 |  | 211
Unrealized losses | (14,472) |  | (14,472) |  | (18,122)
Estimated fair value | $ 277,200 |  | $ 277,200 |  | $ 290,215

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