Intangible Assets (Schedule Of Gross Goodwill And Accumulated Impairment Losses And Write-Offs Detailed By Reportable Segments) (Details) (USD $) In Thousands	3 Months Ended			9 Months Ended				12 Months Ended
	Jun. 30, 2011	Mar. 31, 2011	Mar. 31, 2010	Sep. 30, 2011		Sep. 30, 2010		Dec. 31, 2010	Dec. 31, 2009
Indefinite-lived Intangible Assets by Segment [Line Items]
Gross goodwill				$ 333,654		$ 333,654		$ 333,654	$ 333,654
Accumulated impairments				(114,123)		(104,023)		(104,023)	(100,675)
Accumulated divestiture related write-offs				(85,872)		(67,451)		(67,451)	(67,451)
Goodwill				133,659		162,180		162,180	165,528
Impairments		(10,100)	(3,300)	(10,100)	[1],[2]	(3,348)	[1],[2]
Divestitures	16,400			(18,421)
Net change in goodwill				(28,521)		(3,348)
Non-Strategic [Member]
Indefinite-lived Intangible Assets by Segment [Line Items]
Gross goodwill				199,995		199,995		199,995	199,995
Accumulated impairments				(114,123)		(104,023)		(104,023)	(100,675)
Accumulated divestiture related write-offs				(85,872)		(67,451)		(67,451)	(67,451)
Goodwill						28,521		28,521	31,869
Impairments				(10,100)		(3,348)
Divestitures				(18,421)
Net change in goodwill				(28,521)		(3,348)
Regional Banking [Member]
Indefinite-lived Intangible Assets by Segment [Line Items]
Gross goodwill				36,238		36,238		36,238	36,238
Goodwill				36,238		36,238		36,238	36,238
Capital Markets [Member]
Indefinite-lived Intangible Assets by Segment [Line Items]
Gross goodwill				97,421		97,421		97,421	97,421
Goodwill				$ 97,421		$ 97,421		$ 97,421	$ 97,421

[1] See Note 17 - Restructuring, Repositioning, and Efficiency for further details related to goodwill impairments.

[2] See Note 2 - Acquisitions and Divestitures for further details regarding goodwill related to divestitures.