Other Real Estate Owned (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Other real estate owned ("OREO") covered and not covered under a loss-share agreement, net of valuation allowances and direct write-downs
Covered OREO	$ 41,615	$ 43,156
Not Covered OREO	48,568	70,079
Total OREO	90,183	113,235
Residential real estate [Member]
Other real estate owned ("OREO") covered and not covered under a loss-share agreement, net of valuation allowances and direct write-downs
Covered OREO	7,169	11,110
Not Covered OREO	8,068	15,364
Total OREO	15,237	26,474
Commercial real estate [Member]
Other real estate owned ("OREO") covered and not covered under a loss-share agreement, net of valuation allowances and direct write-downs
Covered OREO	7,079	8,211
Not Covered OREO	9,268	11,479
Total OREO	16,347	19,690
Residential land development [Member]
Other real estate owned ("OREO") covered and not covered under a loss-share agreement, net of valuation allowances and direct write-downs
Covered OREO	5,635	4,441
Not Covered OREO	25,013	36,105
Total OREO	30,648	40,546
Commercial land development [Member]
Other real estate owned ("OREO") covered and not covered under a loss-share agreement, net of valuation allowances and direct write-downs
Covered OREO	21,732	19,394
Not Covered OREO	6,219	7,131
Total OREO	$ 27,951	$ 26,525