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, 2013	Mar. 31, 2012
Covered Assets and Indemnification Asset [Roll Forward]
Balance, beginning of period	$ 10,374	$ 19,491
Additions to covered OREO	1,741	784
Dispositions of covered OREO	(3,665)	(4,582)
Valuation adjustments in the period	(554)	(2,906)
Balance, end of period	$ 7,896	$ 12,787