Loans (Summary Of Financial Receivable Nonaccrual Basis (Non-Covered)) (Detail) (USD $)	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011
Non-covered loans	$ 200,000
Non-Covered Loans
Non-covered loans	38,225,000	70,823,000	59,067,000
Non-Covered Loans | Commercial, financial & agricultural
Non-covered loans	4,285,000	3,987,000	4,570,000
Non-Covered Loans | Real estate - construction & development
Non-covered loans	8,201,000	15,020,000	15,789,000
Non-Covered Loans | Real estate - commercial and farmland
Non-covered loans	11,408,000	35,385,000	24,450,000
Non-Covered Loans | Real estate - residential
Non-covered loans	13,236,000	15,498,000	13,529,000
Non-Covered Loans | Consumer installment loans
Non-covered loans	$ 1,095,000	$ 933,000	$ 729,000