Goodwill and Other Intangible Assets (Narrative) (Details)	9 Months Ended
	Sep. 30, 2011
Finite-Lived Intangible Assets [Line Items]
Weighted average remaining useful life of customer-related and other intangibles (in years)	9
Customer Related And Other Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Minimum estimated remaining useful lives (in years)	1
Maximum estimated remaining useful lives (in years)	10
Commercial Mortgage Servicing Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Minimum estimated remaining useful lives (in years)	5
Maximum estimated remaining useful lives (in years)	10