Debt (Schedule Of Securities Sold Under Agreements To Repurchase) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Debt [Abstract]
Balance at year-end	$ 925	$ 19,414	$ 21,221
Average during the year	5,225	17,497	18,442
Maximum month-end balance	$ 15,857	$ 21,496	$ 22,523
Weighted average rate during the year (in hundredths)	0.29%	0.29%	0.29%
Rate at December 31 (in hundredths)	0.24%	0.29%	0.28%