Loans (Summary Of Covered Loans According To Loan Type) (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011
Covered loans	$ 546,234	$ 571,489	$ 595,428
Commercial, financial & agricultural
Covered loans	37,167	41,867	49,859
Real estate - construction & development
Covered loans	73,356	77,077	82,933
Real estate - commercial and farmland
Covered loans	298,903	321,257	323,760
Real estate - residential
Covered loans	135,154	127,644	135,318
Consumer installment loans
Covered loans	$ 1,654	$ 3,644	$ 3,558