Accumulated Other Comprehensive Loss (Schedule Of Changes In Accumulated Other Comprehensive Loss) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Accumulated Other Comprehensive Loss [Line Items]
Accumulated other comprehensive loss, beginning of period	$ (2,290,000)
Net current-period other comprehensive gain (loss)	9,000	$ (216,000)
Accumulated other comprehensive loss, end of period	(2,281,000)
Unrealized Gains and Losses on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Loss [Line Items]
Accumulated other comprehensive loss, beginning of period	(2,290,000)	(2,037,000)
Other comprehensive gain (loss) before reclassifications	9,000	(216,000)
Net current-period other comprehensive gain (loss)	9,000	(216,000)
Accumulated other comprehensive loss, end of period	(2,281,000)	(2,253,000)
Accumulated other comprehensive loss, end of period	$ 0	$ 0