Accumulated Other Comprehensive Income (Schedule Of Accumulated Other Comprehensive Income) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, beginning of period	$ 96,000
Other comprehensive income (loss), net of tax	(29,000)	$ 144,000
Accumulated other comprehensive income, end of period	67,000
Unrealized Gains and Losses on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, beginning of period	96,000	28,000
Other comprehensive income (loss) before reclassifications	(29,000)	144,000
Other comprehensive income (loss), net of tax	(29,000)	144,000
Accumulated other comprehensive income, end of period	67,000	172,000
Amount reclassified out of other comprehensive income	$ 0	$ 0