Goodwill and Other Intangible Assets (Narrative) (Details)	6 Months Ended
	Jun. 30, 2012 yr
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)	12
Weighted average remaining useful life of customer-related and other intangibles (in years)	9
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