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Securities (Amortized Cost and Fair Value of Debt Securities Held to Maturity) (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Schedule of Held-to-maturity Securities [Line Items] |  |
Securities Held to Maturity, Gross Amortized Cost | $ 2,360,441 | $ 2,435,663
Securities Held to Maturity, Gross Unrealized Gains | 282 | 169
Securities Held to Maturity, Gross Unrealized Losses | 166,096 | 202,306
Securities Held to Maturity, Fair Value | 2,194,627 | 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 | 389,904 | 394,689
Securities Held to Maturity, Gross Unrealized Gains | 221 |
Securities Held to Maturity, Gross Unrealized Losses | 37,288 | 45,876
Securities Held to Maturity, Fair Value | 352,837 | 348,813
Municipal Obligations [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Securities Held to Maturity, Gross Amortized Cost | 585,857 | 623,907
Securities Held to Maturity, Gross Unrealized Gains | 61 | 169
Securities Held to Maturity, Gross Unrealized Losses | 17,395 | 20,867
Securities Held to Maturity, Fair Value | 568,523 | 603,209
Residential Mortgage-Backed Securities [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Securities Held to Maturity, Gross Amortized Cost | 553,972 | 573,057
Securities Held to Maturity, Gross Unrealized Losses | 49,163 | 61,525
Securities Held to Maturity, Fair Value | 504,809 | 511,532
Commercial Mortgage-Backed Securities [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Securities Held to Maturity, Gross Amortized Cost | 806,954 | 818,604
Securities Held to Maturity, Gross Unrealized Losses | 61,296 | 72,854
Securities Held to Maturity, Fair Value | 745,658 | 745,750
Collateralized Mortgage Obligations [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Securities Held to Maturity, Gross Amortized Cost | 23,754 | 25,406
Securities Held to Maturity, Gross Unrealized Losses | 954 | 1,184
Securities Held to Maturity, Fair Value | $ 22,800 | $ 24,222

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