Investment Securities (Gains And Losses, Including OTTI, Recognized In Statement Of Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Investments [Abstract]
Investment securities, Held-to-maturity, Gross gains	$ 0	$ 7	$ 0	$ 31
Other than Temporary Impairment Losses, Investments, Held-to-maturity Securities	0	0	27	403
Investment securities, Available-for-sale, Gross gains	5,032	3,162	77,593	6,438
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities	6	8,539	41,653	18,254
Other noninterest-bearing investments, Nonmarketable equity securities, Gross gains	3,745	2,209	4,657	5,066
Other noninterest-bearing investments, Nonmarketable equity securities, Gross losses	1,232	0	1,232	25
Total investment securities and other noninterest-bearing investments, Gross gains	8,777	5,378	82,250	11,535
Total investment securities and other noninterest-bearing investments, Gross losses	1,238	8,539	42,912	18,682
Net losses	7,539	(3,161)	39,338	(7,147)
Net impairment losses on investment securities	0	(4,217)	(27)	(14,334)
Equity securities gains (losses)	2,513	2,209	3,425	5,041
Fixed income securities gains (losses), net	$ 5,026	$ (1,153)	$ 35,940	$ 2,146