Covered Assets And Indemnification Asset (Summary Of Activity In Covered Other Real Estate Owned) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Covered Assets And Indemnification Asset [Abstract]
Balance, beginning of period	$ 19,491	$ 29,863
Additions to covered OREO	784	3,036
Dispositions of covered OREO	(4,582)	(3,954)
Valuation adjustments in the period	(2,906)	(1,256)
Balance, end of period	$ 12,787	$ 27,689