Covered Loans (Summary Of Activity For Indemnification Asset And Loss Share Receivable) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Covered Loans [Line Items]
Indemnification Asset, Opening Balance	$ 147,566	$ 0
Indemnification Asset, Ending Balance	127,717	0
Loss Share Receivable, Opening Balance	20,148
Loss Share Receivable, Established through acquisitions	0
Loss Share Receivable, Reclass from indemnification asset	20,608
Loss Share Receivable, Cash received from FDIC	(32,433)
Loss Share Receivable, Ending Balance	8,323
Adjustments Not Reflected In Income [Member]
Covered Loans [Line Items]
Indemnification Asset, Established through acquisitions	0
Indemnification Asset, Reclass to loss claim receivable	(20,608)
Indemnification Asset, Other	0
Adjustments Reflected In Income [Member]
Covered Loans [Line Items]
Indemnification Asset, (Amortization) accretion	(7,270)
Indemnification Asset, Adjustment in loss expectations	$ 8,029