Investment Securities (Changes In Recorded Credit Losses) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014	Dec. 31, 2013
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held	$ 14,166	$ 13,410	$ 13,734	$ 12,499
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, No Previous Impairment	76	0
Credit losses on debt securities for which impairment was previously recognized	407	977
Increase in expected cash flows that are recognized over remaining life of security	$ (51)	$ (66)