Changes in Noncovered Other Real Estate Owned (Summary of Noncovered Other Real Estate Owned) (Details) (USD $) In Thousands	9 Months Ended		3 Months Ended	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011 Noncovered OREO [Member]	Sep. 30, 2011 Noncovered OREO [Member]
Balance, beginning of period			$ 22,739	$ 30,991
Transfers in, net of write-downs ($0 for Q3 2011 and $108 for Q3 2011YTD)			5,287	8,434
Writedowns Previously Recorded On Transfer In Of Real Estate Acquired Through Foreclosure			0	(108)
OREO improvements			257	726
Additional OREO write-downs			(644)	(5,090)
Proceeds from sale of OREO property	(10,234)	(3,943)	(2,359)	(10,234)
Net realized gain on sale of other real estate owned	7,069	3,527	(224)	229
Total noncovered OREO, end of period			$ 25,056	$ 25,056