Investment Securities (Gains And Losses, Including OTTI, Recognized In Statement Of Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Investments [Abstract]
Investment securities, Held-to-maturity, Gross gains	$ 0	$ 24
Other than Temporary Impairment Losses, Investments, Held-to-maturity Securities	27	403
Investment securities, Available-for-sale, Gross gains	72,561	3,276
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities	41,647	9,715
Other noninterest-bearing investments, Nonmarketable equity securities, Gross gains	912	2,857
Other noninterest-bearing investments, Nonmarketable equity securities, Gross losses	0	25
Total investment securities and other noninterest-bearing investments, Gross gains	73,473	6,157
Total investment securities and other noninterest-bearing investments, Gross losses	41,674	10,143
Net losses	31,799	(3,986)
Net impairment losses on investment securities	(27)	(10,117)
Equity securities gains (losses)	912	2,832
Fixed income securities gains (losses), net	$ 30,914	$ 3,299