Summary Of Significant Accounting Policies (Details) (USD $)	0 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2011
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of States in which Entity Operates	10		10
Increase in other service charges, commissions and fees from reclassification of credit card interchange fees				$ 16,300,000
Percentage of ownership in equity investments (greater than)	20.00%		20.00%
Security resell agreements maturity days	30
Security resell agreements maximum amount, outstanding	2,300,000,000		2,300,000,000
Percentage of acquired assets and all assumed liabilities recognized in business combination		100.00%
Estimated useful lives of core deposit assets and other intangibles (in years)	12 years
Unconsolidated subsidiaries accounted for under the cost, fair value, or equity method when ownerhsip is less than	20.00%		20.00%
Decrease in interest and fees on loans from reclassification of credit card interchange fees				16,300,000
Number of variable interest entities consolidated	0		0
Security resell agreements average amount			$ 675,000,000
Minimum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated useful lives of properties, Minimum (in years)	25 years
Minimum [Member] | Furniture And Equipment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated useful lives of properties, Minimum (in years)	3 years
Minimum [Member] | Software License Arrangement [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated useful lives of properties, Minimum (in years)	3 years
Minimum [Member] | New Lending and Deposit System Software [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated useful lives of properties, Minimum (in years)	10 years
Maximum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated useful lives of properties, Minimum (in years)	40 years
Maximum [Member] | Furniture And Equipment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated useful lives of properties, Minimum (in years)	10 years
Maximum [Member] | Software License Arrangement [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated useful lives of properties, Minimum (in years)	5 years