Loans (Summary Of Financial Receivable Nonaccrual Basis (Covered)) (Detail) (USD $)	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011
Covered loans	$ 200,000
Covered Loan
Covered loans	123,901,000	159,999,000	144,251,000
Commercial, financial & agricultural | Covered Loan
Covered loans	11,938,000	11,952,000	12,136,000
Real estate - construction & development | Covered Loan
Covered loans	21,971,000	30,977,000	32,878,000
Real estate - commercial and farmland | Covered Loan
Covered loans	58,377,000	75,458,000	63,940,000
Real estate - residential | Covered Loan
Covered loans	31,189,000	41,139,000	34,846,000
Consumer installment loans | Covered Loan
Covered loans	$ 426,000	$ 473,000	$ 451,000