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Securities (Securities Held to Maturity with Unrealized Losses) (Details) - USD ($) $ in Thousands | Dec. 31, 2025 | Dec. 31, 2024
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Schedule of Held-to-maturity Securities [Line Items] |  |
Held to Maturity, Losses less than 12 months, Fair Value | $ 98,559 | $ 109,688
Held to Maturity, Losses less than 12 months, Gross Unrealized Losses | 97 | 1,291
Held to Maturity, Losses 12 months or longer, Fair Value | 1,808,602 | 2,100,656
Held to Maturity, Losses 12 months or longer, Gross Unrealized Losses | 122,715 | 201,015
Held To Maturity Securities Unrealized Loss Position Fair Value, Total | 1,907,161 | 2,210,344
Held to Maturity, Total, Gross Unrealized Losses | 122,812 | 202,306
U.S. Treasury And Government Agency Securities [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Held to Maturity, Losses less than 12 months, Fair Value | 0 | 27,660
Held to Maturity, Losses less than 12 months, Gross Unrealized Losses | 0 | 840
Held to Maturity, Losses 12 months or longer, Fair Value | 316,814 | 321,154
Held to Maturity, Losses 12 months or longer, Gross Unrealized Losses | 30,143 | 45,036
Held To Maturity Securities Unrealized Loss Position Fair Value, Total | 316,814 | 348,814
Held to Maturity, Total, Gross Unrealized Losses | 30,143 | 45,876
Municipal Obligations [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Held to Maturity, Losses less than 12 months, Fair Value | 98,559 | 82,028
Held to Maturity, Losses less than 12 months, Gross Unrealized Losses | 97 | 451
Held to Maturity, Losses 12 months or longer, Fair Value | 325,241 | 497,999
Held to Maturity, Losses 12 months or longer, Gross Unrealized Losses | 11,358 | 20,416
Held To Maturity Securities Unrealized Loss Position Fair Value, Total | 423,800 | 580,027
Held to Maturity, Total, Gross Unrealized Losses | 11,455 | 20,867
Residential Mortgage-Backed Securities [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Held to Maturity, Losses less than 12 months, Fair Value | 0 | 0
Held to Maturity, Losses less than 12 months, Gross Unrealized Losses | 0 | 0
Held to Maturity, Losses 12 months or longer, Fair Value | 463,099 | 511,531
Held to Maturity, Losses 12 months or longer, Gross Unrealized Losses | 34,239 | 61,525
Held To Maturity Securities Unrealized Loss Position Fair Value, Total | 463,099 | 511,531
Held to Maturity, Total, Gross Unrealized Losses | 34,239 | 61,525
Commercial Mortgage-Backed Securities [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Held to Maturity, Losses less than 12 months, Fair Value | 0 | 0
Held to Maturity, Losses less than 12 months, Gross Unrealized Losses | 0 | 0
Held to Maturity, Losses 12 months or longer, Fair Value | 684,874 | 745,750
Held to Maturity, Losses 12 months or longer, Gross Unrealized Losses | 46,455 | 72,854
Held To Maturity Securities Unrealized Loss Position Fair Value, Total | 684,874 | 745,750
Held to Maturity, Total, Gross Unrealized Losses | 46,455 | 72,854
Collateralized Mortgage Obligations [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Held to Maturity, Losses less than 12 months, Fair Value | 0 | 0
Held to Maturity, Losses less than 12 months, Gross Unrealized Losses | 0 | 0
Held to Maturity, Losses 12 months or longer, Fair Value | 18,574 | 24,222
Held to Maturity, Losses 12 months or longer, Gross Unrealized Losses | 520 | 1,184
Held To Maturity Securities Unrealized Loss Position Fair Value, Total | 18,574 | 24,222
Held to Maturity, Total, Gross Unrealized Losses | $ 520 | $ 1,184

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