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Loans and Leases (Changes In Carrying Value Of Acquired Impaired Loans) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2012 Impaired At Acquisition Date [Member] | Mar. 31, 2011 Impaired At Acquisition Date [Member] | Mar. 31, 2012 All Other Acquired Loans [Member] | Mar. 31, 2011 All Other Acquired Loans [Member] | Mar. 31, 2012 Loans on the Cost Recovery Method [Member] | Dec. 31, 2011 Loans on the Cost Recovery Method [Member] | Mar. 31, 2011 Loans on the Cost Recovery Method [Member]
Balance, January 1 | $ 458,305 | $ 330,705 | $ 1,903,847 | $ 1,676,747 | $ 171,951 | $ 200,819 | $ 202,873
Fair value of acquired loans covered by loss share agreements | 0 | 120,670 | 0 | 646,489 |  |  |
Reductions for repayments foreclosures and decreases in fair value | (66,364) | (45,595) | (111,919) | (70,882) |  |  |
Balance, March 31 | 391,941 | 405,780 | 1,791,928 | 2,252,354 | 171,951 | 200,819 | 202,873
Outstanding principal balance at March 31 | $ 1,222,862 | $ 1,011,908 | $ 2,395,860 | $ 2,908,609 |  |  |

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