Changes in Noncovered Other Real Estate Owned (Summary of Noncovered Other Real Estate Owned) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Other Real Estate Owned [Line Items]
Balance, beginning of period			$ 26,987
Proceeds from sale of OREO property			(6,076)	(11,899)
Gain (loss) on sale of OREO			6,291	6,277
Total OREO, end of period	37,193		37,193
Noncovered Loans [Member]
Other Real Estate Owned [Line Items]
Balance, beginning of period	11,916	16,744	10,676	22,893
Transfers in, net of write-downs ($11, $0, $43 and $118)	2,067	2,585	4,777	6,388
Transfers in, write-downs	11	0
OREO improvements	0	0	0	11
Additional OREO write-down	(477)	(2,052)	(570)	(3,774)
Proceeds from sale of OREO property	(4,057)	(4,069)	(5,622)	(11,899)
Gain (loss) on sale of OREO	182	717	370	306
Total OREO, end of period	$ 24,339	$ 13,925	$ 24,339	$ 13,925