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Securities (Amortized Cost and Fair Value of Debt Securities Held to Maturity) (Details) - USD ($) $ in Thousands | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Schedule of Held-to-maturity Securities [Line Items] |  |
Securities Held to Maturity, Gross Amortized Cost | $ 2,132,882 | $ 2,435,663
Securities Held to Maturity, Gross Unrealized Gains | 956 | 169
Securities Held to Maturity, Gross Unrealized Losses | 122,812 | 202,306
Securities Held to Maturity, Fair Value | 2,011,026 | 2,233,526
U.S. Treasury And Government Agency Securities [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Securities Held to Maturity, Gross Amortized Cost | 373,605 | 394,689
Securities Held to Maturity, Gross Unrealized Gains | 248 | 0
Securities Held to Maturity, Gross Unrealized Losses | 30,143 | 45,876
Securities Held to Maturity, Fair Value | 343,710 | 348,813
Municipal Obligations [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Securities Held to Maturity, Gross Amortized Cost | 511,516 | 623,907
Securities Held to Maturity, Gross Unrealized Gains | 708 | 169
Securities Held to Maturity, Gross Unrealized Losses | 11,455 | 20,867
Securities Held to Maturity, Fair Value | 500,769 | 603,209
Residential Mortgage-Backed Securities [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Securities Held to Maturity, Gross Amortized Cost | 497,338 | 573,057
Securities Held to Maturity, Gross Unrealized Losses | 34,239 | 61,525
Securities Held to Maturity, Fair Value | 463,099 | 511,532
Commercial Mortgage-Backed Securities [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Securities Held to Maturity, Gross Amortized Cost | 731,329 | 818,604
Securities Held to Maturity, Gross Unrealized Losses | 46,455 | 72,854
Securities Held to Maturity, Fair Value | 684,874 | 745,750
Collateralized Mortgage Obligations [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Securities Held to Maturity, Gross Amortized Cost | 19,094 | 25,406
Securities Held to Maturity, Gross Unrealized Losses | 520 | 1,184
Securities Held to Maturity, Fair Value | $ 18,574 | $ 24,222

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