Loans and Leases (Changes In Carrying Value Of Acquired Impaired Loans) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013 Impaired At Acquisition Date	Mar. 31, 2012 Impaired At Acquisition Date	Mar. 31, 2013 All Other Acquired Loans	Mar. 31, 2012 All Other Acquired Loans	Mar. 31, 2013 Loans on the Cost Recovery Method	Dec. 31, 2012 Loans on the Cost Recovery Method	Mar. 31, 2012 Loans on the Cost Recovery Method
Carrying Value of Acquired Impaired Loans [Roll Forward]
Beginning balance	$ 290,626	$ 458,305	$ 1,518,609	$ 1,903,847	$ 43,882	$ 74,479	$ 171,951
Reductions for repayments, foreclosures and changes in carrying value, net of accretion	(35,359)	(66,364)	(152,549)	(111,919)
Ending balance	255,267	391,941	1,366,060	1,791,928	43,882	74,479	171,951
Outstanding principal balance	$ 858,645	$ 1,222,862	$ 1,838,709	$ 2,395,860