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Loans And Leases (Changes In Carrying Value Of Acquired Impaired Loans) (Details) (USD $) In Thousands | 9 Months Ended
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Sep. 30, 2011 | Sep. 30, 2010
Impaired At Acquisition Date [Member] |  |
Balance, January 1 | $ 330,705 | $ 75,368
Fair value of acquired loans covered by loss share agreements | 303,713 | 412,627
Reductions for repayments foreclosures and decreases in fair value | (134,713) | (87,249)
Balance, September 30 | 499,705 | 400,746
Outstanding principal balance at September 30 | 1,943,770 | 742,010
All Other Acquired Loans [Member] |  |
Balance, January 1 | 1,676,747 | 1,097,652
Fair value of acquired loans covered by loss share agreements | 777,800 | 1,138,513
Reductions for repayments foreclosures and decreases in fair value | (396,802) | (414,251)
Balance, September 30 | 2,057,745 | 1,821,914
Outstanding principal balance at September 30 | $ 2,705,324 | $ 2,535,003

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