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Securities - Available for Sale Securities With Gross Unrealized Losses and Their Fair Value (Details) $ in Thousands | Sep. 30, 2024 USD ($) | Dec. 31, 2023 USD ($)
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Held-to-maturity securities have been in a continuous unrealized loss position, number of positions | 4 | 4
Held-to-maturity securities have been in a continuous unrealized loss position, fair value | $ 63,952 | $ 65,755
Held-to-maturity securities have been in a continuous unrealized loss position, unrealized loss | (8,834) | (8,255)
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, fair value | 63,952 | 65,755
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ (8,834) | $ (8,255)
Securities have been in a continuous unrealized loss position, number of positions | 165 | 166
Securities have been in a continuous unrealized loss position, fair value | $ 784,522 | $ 702,778
Securities have been in a continuous unrealized loss position, unrealized losses | (70,051) | (83,020)
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 284,920 | 33,856
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | (1,001) | (1,360)
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 499,602 | 668,922
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ (69,050) | $ (81,660)
Total Other Securities [Member] |  |
Held-to-maturity securities have been in a continuous unrealized loss position, number of positions | 3 | 3
Held-to-maturity securities have been in a continuous unrealized loss position, fair value | $ 56,709 | $ 58,697
Held-to-maturity securities have been in a continuous unrealized loss position, unrealized loss | (8,236) | (7,458)
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, fair value | 56,709 | 58,697
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ (8,236) | $ (7,458)
Securities have been in a continuous unrealized loss position, number of positions | 51 | 51
Securities have been in a continuous unrealized loss position, fair value | $ 421,896 | $ 350,575
Securities have been in a continuous unrealized loss position, unrealized losses | (15,324) | (19,358)
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 252,688 | 27,945
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | (948) | (1,325)
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 169,208 | 322,630
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ (14,376) | $ (18,033)
US States and Political Subdivisions Debt Securities [Member] |  |
Held-to-maturity securities have been in a continuous unrealized loss position, number of positions | 3 | 3
Held-to-maturity securities have been in a continuous unrealized loss position, fair value | $ 56,709 | $ 58,697
Held-to-maturity securities have been in a continuous unrealized loss position, unrealized loss | (8,236) | (7,458)
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, fair value | 56,709 | 58,697
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ (8,236) | $ (7,458)
US Government Agencies Debt Securities [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 5 | 8
Securities have been in a continuous unrealized loss position, fair value | $ 24,297 | $ 74,517
Securities have been in a continuous unrealized loss position, unrealized losses | (266) | (937)
Securities have been in a continuous unrealized loss position, less than 12 months, fair value |  | 2,517
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses |  | (7)
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 24,297 | 72,000
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ (266) | $ (930)
Corporate Debt Securities [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 24 | 26
Securities have been in a continuous unrealized loss position, fair value | $ 148,377 | $ 155,449
Securities have been in a continuous unrealized loss position, unrealized losses | (14,133) | (17,735)
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 3,466 | 25,428
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | (23) | (1,318)
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 144,911 | 130,021
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ (14,110) | $ (16,417)
Collateralized Debt Obligations [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 22 | 17
Securities have been in a continuous unrealized loss position, fair value | $ 249,222 | $ 120,609
Securities have been in a continuous unrealized loss position, unrealized losses | (925) | (686)
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 249,222 |
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | $ (925) |
Securities have been in a continuous unrealized loss position, 12 months or more, fair value |  | 120,609
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses |  | $ (686)
Collateralized Mortgage Backed Securities |  |
Held-to-maturity securities have been in a continuous unrealized loss position, number of positions | 1 | 1
Held-to-maturity securities have been in a continuous unrealized loss position, fair value | $ 7,243 | $ 7,058
Held-to-maturity securities have been in a continuous unrealized loss position, unrealized loss | (598) | (797)
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, fair value | 7,243 | 7,058
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ (598) | $ (797)
Securities have been in a continuous unrealized loss position, number of positions | 114 | 115
Securities have been in a continuous unrealized loss position, fair value | $ 362,626 | $ 352,203
Securities have been in a continuous unrealized loss position, unrealized losses | (54,727) | (63,662)
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 32,232 | 5,911
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | (53) | (35)
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 330,394 | 346,292
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ (54,674) | $ (63,627)
REMIC and CMO [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 48 | 46
Securities have been in a continuous unrealized loss position, fair value | $ 155,212 | $ 133,312
Securities have been in a continuous unrealized loss position, unrealized losses | (23,144) | (26,591)
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 28,389 |
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | (43) |
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 126,823 | 133,312
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ (23,101) | $ (26,591)
GNMA [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 6 | 7
Securities have been in a continuous unrealized loss position, fair value | $ 10,188 | $ 10,466
Securities have been in a continuous unrealized loss position, unrealized losses | (1,517) | (1,740)
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 3,843 | 3,867
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | (10) | (34)
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 6,345 | 6,599
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ (1,507) | $ (1,706)
FNMA [Member] |  |
Held-to-maturity securities have been in a continuous unrealized loss position, number of positions | 1 | 1
Held-to-maturity securities have been in a continuous unrealized loss position, fair value | $ 7,243 | $ 7,058
Held-to-maturity securities have been in a continuous unrealized loss position, unrealized loss | (598) | (797)
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, fair value | 7,243 | 7,058
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ (598) | $ (797)
Securities have been in a continuous unrealized loss position, number of positions | 42 | 44
Securities have been in a continuous unrealized loss position, fair value | $ 125,290 | $ 133,394
Securities have been in a continuous unrealized loss position, unrealized losses | (17,541) | (20,935)
Securities have been in a continuous unrealized loss position, less than 12 months, fair value |  | 2,044
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses |  | (1)
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 125,290 | 131,350
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ (17,541) | $ (20,934)
FHLMC [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 18 | 18
Securities have been in a continuous unrealized loss position, fair value | $ 71,936 | $ 75,031
Securities have been in a continuous unrealized loss position, unrealized losses | (12,525) | (14,396)
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 71,936 | 75,031
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ (12,525) | $ (14,396)

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