Investments In Securities and Fair Value (Schedule Of Unrealized Losses On Investments) (Details) $ in Thousands	Jun. 30, 2025 USD ($) segment	Dec. 31, 2024 USD ($) segment
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, unrealized loss position, number of positions | segment	28	60
General obligations of U.S. states, territories and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Total temporarily impaired securities, less than 12 months, fair value	$ 1,849	$ 1,960
Total temporarily impaired securities, less than 12 Months, unrealized losses	(66)	(2)
Total temporarily impaired securities, 12 months or longer, fair value	4,805	2,780
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer, accumulated loss	(11)	(29)
Debt securities, available-for-sale, unrealized loss position, total	6,654	4,740
Debt securities, available-for-sale, unrealized loss position, accumulated loss	(77)	(31)
Special revenue issuer obligations of U.S. states, territories and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Total temporarily impaired securities, less than 12 months, fair value	2,643	5,477
Total temporarily impaired securities, less than 12 Months, unrealized losses	(55)	(45)
Total temporarily impaired securities, 12 months or longer, fair value	1,564	2,828
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer, accumulated loss	(24)	(28)
Debt securities, available-for-sale, unrealized loss position, total	4,207	8,305
Debt securities, available-for-sale, unrealized loss position, accumulated loss	(79)	(73)
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Total temporarily impaired securities, less than 12 months, fair value	7,525	22,641
Total temporarily impaired securities, less than 12 Months, unrealized losses	(9)	(131)
Total temporarily impaired securities, 12 months or longer, fair value	50	149
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer, accumulated loss	0	(1)
Debt securities, available-for-sale, unrealized loss position, total	7,575	22,790
Debt securities, available-for-sale, unrealized loss position, accumulated loss	(9)	(132)
Total temporarily impaired securities
Debt Securities, Available-for-sale [Line Items]
Total temporarily impaired securities, less than 12 months, fair value	12,017	30,078
Total temporarily impaired securities, less than 12 Months, unrealized losses	(130)	(178)
Total temporarily impaired securities, 12 months or longer, fair value	6,419	5,757
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer, accumulated loss	(35)	(58)
Debt securities, available-for-sale, unrealized loss position, total	18,436	35,835
Debt securities, available-for-sale, unrealized loss position, accumulated loss	$ (165)	$ (236)