Covered Loans (Composition Of Covered Loans By Lending Classification) (Details) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2010
Covered loans	$ 711,266	$ 0	$ 0
Allowance for loan losses	(303)	0	0
Covered loans, net	710,963
Commercial [Member]
Covered loans	154,251
Commercial Real Estate [Member]
Covered loans	367,758
Residential [Member]
Covered loans	50,726
Consumer [Member]
Covered loans	$ 138,531