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Investments (Gross Unrealized Losses And Fair Value Of Investments) (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Less Than Twelve Months |  |
Estimated Fair Value | $ 121,665 | $ 9,637
Unrealized Loss | 10,522 | 10,337
Estimated Fair Value | 922,544 | 955,196
Twelve Months or Greater |  |
Unrealized Loss | 147,541 | 133,941
Estimated Fair Value | 1,044,209 | 964,833
Unrealized Loss | 158,063 | 144,278
Obligations of states and political subdivisions |  |
Less Than Twelve Months |  |
Estimated Fair Value | 17,733 | 7,591
Unrealized Loss | 505 | 66
Estimated Fair Value | 179,538 | 180,560
Twelve Months or Greater |  |
Unrealized Loss | 17,918 | 16,023
Estimated Fair Value | 197,271 | 188,151
Unrealized Loss | 18,423 | 16,089
U.S. Government agencies |  |
Less Than Twelve Months |  |
Estimated Fair Value | 102,346 | 2,046
Unrealized Loss | 10,002 | 10,271
Estimated Fair Value | 708,833 | 740,914
Twelve Months or Greater |  |
Unrealized Loss | 127,750 | 115,482
Estimated Fair Value | 811,179 | 742,960
Unrealized Loss | 137,752 | 125,753
Private label |  |
Less Than Twelve Months |  |
Estimated Fair Value | 1,586 | 0
Unrealized Loss | 15 | 0
Estimated Fair Value | 4,861 | 4,835
Twelve Months or Greater |  |
Unrealized Loss | 247 | 293
Estimated Fair Value | 6,447 | 4,835
Unrealized Loss | 262 | 293
Trust preferred securities |  |
Less Than Twelve Months |  |
Estimated Fair Value | 0 | 0
Unrealized Loss | 0 | 0
Estimated Fair Value | 4,593 | 4,278
Twelve Months or Greater |  |
Unrealized Loss | 9 | 321
Estimated Fair Value | 4,593 | 4,278
Unrealized Loss | 9 | 321
Corporate securities |  |
Less Than Twelve Months |  |
Estimated Fair Value | 0 | 0
Unrealized Loss | 0 | 0
Estimated Fair Value | 24,719 | 24,609
Twelve Months or Greater |  |
Unrealized Loss | 1,617 | 1,822
Estimated Fair Value | 24,719 | 24,609
Unrealized Loss | $ 1,617 | $ 1,822

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