Securities Available For Sale (Schedule Of OTTI Related To Historical Estimated Credit Losses On Debt Securities And Changes In Estimated Credit Losses Recognized In Pre-Tax Earnings) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Securities Available For Sale [Abstract]
Estimated credit losses as of beginning of period	$ 3,413	$ 3,413	$ 3,413	$ 3,923
Additions for credit losses for securities on which OTTI has been previously recognized
Additions for credit losses for securities on which OTTI has not been previously recognized
Reductions for securities paid off during the period	$ 233		$ 233	$ 510
Estimated credit losses as of ending of period	$ 3,180	$ 3,413	$ 3,180	$ 3,413