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Investments (Gross Unrealized Losses And Fair Value Of Investments) (Details) - USD ($) $ in Thousands | Jun. 30, 2026 | Dec. 31, 2025
--- | --- | ---
Less Than Twelve Months |  |
Estimated Fair Value | $ 273,203 | $ 57,725
Unrealized Loss | 1,927 | 357
Estimated Fair Value | 905,877 | 952,624
Twelve Months or Greater |  |
Unrealized Loss | 108,162 | 107,552
Estimated Fair Value | 1,179,080 | 1,010,349
Unrealized Loss | 110,089 | 107,909
Obligations of states and political subdivisions |  |
Less Than Twelve Months |  |
Estimated Fair Value | 5,612 | 4,746
Unrealized Loss | 57 | 29
Estimated Fair Value | 122,499 | 129,347
Twelve Months or Greater |  |
Unrealized Loss | 9,429 | 10,061
Estimated Fair Value | 128,111 | 134,093
Unrealized Loss | 9,486 | 10,090
U.S. Government agencies |  |
Less Than Twelve Months |  |
Estimated Fair Value | 267,591 | 48,555
Unrealized Loss | 1,870 | 140
Estimated Fair Value | 759,466 | 803,686
Twelve Months or Greater |  |
Unrealized Loss | 98,024 | 96,964
Estimated Fair Value | 1,027,057 | 852,241
Unrealized Loss | 99,894 | 97,104
Private label |  |
Less Than Twelve Months |  |
Estimated Fair Value | 0 | 0
Unrealized Loss | 0 | 0
Estimated Fair Value | 4,983 | 5,032
Twelve Months or Greater |  |
Unrealized Loss | 72 | 36
Estimated Fair Value | 4,983 | 5,032
Unrealized Loss | 72 | 36
Trust preferred securities |  |
Less Than Twelve Months |  |
Estimated Fair Value | 0 | 4,424
Unrealized Loss | 0 | 188
Estimated Fair Value | 4,538 | 0
Twelve Months or Greater |  |
Unrealized Loss | 78 | 0
Estimated Fair Value | 4,538 | 4,424
Unrealized Loss | 78 | 188
Corporate securities |  |
Less Than Twelve Months |  |
Estimated Fair Value | 0 | 0
Unrealized Loss | 0 | 0
Estimated Fair Value | 14,391 | 14,559
Twelve Months or Greater |  |
Unrealized Loss | 559 | 491
Estimated Fair Value | 14,391 | 14,559
Unrealized Loss | $ 559 | $ 491

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