Goodwill And Other Intangible Assets (Estimated Amortization) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended					12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011 Great Lakes Advisors, Inc [Member] Wealth Management [Member] Noncompete Agreements [Member]	Sep. 30, 2011 Great Lakes Advisors, Inc [Member] Wealth Management [Member] Trademarks [Member]	Sep. 30, 2011 Core Deposits Intangibles [Member]	Dec. 31, 2009 Customer Lists Intangibles [Member]
Actual in 9 months ended September 30, 2011	$ 970	$ 701	$ 2,363	$ 2,020
Estimated remaining in 2011			1,042
Estimated - 2012			4,073
Estimated - 2013			3,860
Estimated - 2014			3,384
Estimated - 2015			1,898
Amortization period in years, core deposit intangibles					2	20	10	18
Finite-Lived intangible assets, amortization expense	$ 970	$ 701	$ 2,363	$ 2,020