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Loans and Leases (Changes In Carrying Value Of Acquired Impaired Loans) (Details) (USD $) In Thousands, unless otherwise specified | 6 Months Ended |  |  |
--- | --- | --- | --- | ---
Jun. 30, 2012 Impaired At Acquisition Date | Jun. 30, 2011 Impaired At Acquisition Date | Jun. 30, 2012 All Other Acquired Loans | Jun. 30, 2011 All Other Acquired Loans | Jun. 30, 2012 Loans on the Cost Recovery Method | Dec. 31, 2011 Loans on the Cost Recovery Method | Jun. 30, 2011 Loans on the Cost Recovery Method
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |
Balance, January 1 | $ 458,305 | $ 330,705 | $ 1,903,847 | $ 1,676,747 | $ 166,138 | $ 200,819 | $ 249,724
Fair value of acquired loans covered by loss share agreements | 0 | 99,344 | 0 | 660,007 |  |  |
Reductions for repayments, foreclosures and changes in fair value | (120,657) | (119,650) | (242,144) | (247,415) |  |  |
Balance, June 30 | 337,648 | 310,399 | 1,661,703 | 2,089,339 | 166,138 | 200,819 | 249,724
Outstanding principal balance at June 30 | $ 1,156,145 | $ 1,100,257 | $ 2,293,228 | $ 2,937,273 |  |  |

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