Investment Securities (Cash Flow Model Inputs Used To Calculate Credit Losses) (Details)	Jun. 30, 2014
Minimum [Member]
Investment [Line Items]
Prepayment CPR	1.00%
Projected cumulative default	0.00%
Credit support	0.00%
Loss severity	20.00%
Maximum [Member]
Investment [Line Items]
Prepayment CPR	25.00%
Projected cumulative default	56.00%
Credit support	14.00%
Loss severity	81.00%