Accumulated Other Comprehensive Income (Loss) (Summary Of Changes In Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		$ (5,020)
Other comprehensive income (loss)		2,943	$ (3,660)
Ending balance		(2,077)
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss)		2,943	(3,660)
Amount Reclassified From Accumulated Other Comprehensive Income (Loss) [Member] | Unrealized gains (losses) on available for sale securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	[1]	(5,020)	(2,667)
Other comprehensive income (loss) before reclassification	[1]	2,943	(3,548)
Amount reclassified from accumulated other comprehensive loss	[1]	0	(112)
Other comprehensive income (loss)	[1]	2,943	(3,660)
Ending balance	[1]	$ (2,077)	$ (6,327)

[1] All amounts are net of tax. Amounts in parentheses indicate debits.