Covered Assets And Indemnification Asset (Summary Of Activity In Covered Other Real Estate Owned) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Covered Assets And Indemnification Asset [Abstract]
Balance, beginning of period	$ 29,863
Acquisition		26,939
Additions to covered OREO	15,271	15,350
Dispositions of covered OREO	(16,934)	(10,485)
Valuation adjustments in the period	(8,709)	(1,941)
Balance, end of period	$ 19,491	$ 29,863