Investments (Gross Unrealized Losses And Fair Value Of Investments) (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Less Than Twelve Months
Estimated Fair Value	$ 65,197	$ 134,284
Unrealized Loss	8,967	13,091
Estimated Fair Value	894,814	891,127
Twelve Months or Greater
Unrealized Loss	118,711	138,469
Estimated Fair Value	960,011	1,025,411
Unrealized Loss	127,678	151,560
Obligations of states and political subdivisions
Less Than Twelve Months
Estimated Fair Value	6,350	19,724
Unrealized Loss	126	422
Estimated Fair Value	149,636	151,508
Twelve Months or Greater
Unrealized Loss	15,268	15,097
Estimated Fair Value	155,986	171,232
Unrealized Loss	15,394	15,519
U.S. Government agencies
Less Than Twelve Months
Estimated Fair Value	54,417	114,560
Unrealized Loss	8,663	12,669
Estimated Fair Value	715,841	710,651
Twelve Months or Greater
Unrealized Loss	102,553	121,998
Estimated Fair Value	770,258	825,211
Unrealized Loss	111,216	134,667
Private label
Less Than Twelve Months
Estimated Fair Value	0	0
Unrealized Loss	0	0
Estimated Fair Value	4,973	4,933
Twelve Months or Greater
Unrealized Loss	105	163
Estimated Fair Value	4,973	4,933
Unrealized Loss	105	163
Trust preferred securities
Less Than Twelve Months
Estimated Fair Value	4,430	0
Unrealized Loss	178	0
Estimated Fair Value	0	0
Twelve Months or Greater
Unrealized Loss	0	0
Estimated Fair Value	4,430	0
Unrealized Loss	178	0
Corporate securities
Less Than Twelve Months
Estimated Fair Value	0	0
Unrealized Loss	0	0
Estimated Fair Value	24,364	24,035
Twelve Months or Greater
Unrealized Loss	785	1,211
Estimated Fair Value	24,364	24,035
Unrealized Loss	$ 785	$ 1,211

Debt Securities, Available for Sale, 12 Months or Greater

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Debt Securities, Available for Sale, Less than 12 Months

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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