Loans (Summary Of Trouble Debt Restructuring By Loan Class) (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Troubled debt restructuring loans	$ 23,300	$ 26,100
Accrual Loan
Number of contracts	51	39
Troubled debt restructuring loans	19,893	17,951
Accrual Loan | Commercial, financial & agricultural
Number of contracts	5
Troubled debt restructuring loans	804
Accrual Loan | Real estate - construction & development
Number of contracts	4	6
Troubled debt restructuring loans	1,481	1,774
Accrual Loan | Real estate - commercial and farmland
Number of contracts	15	14
Troubled debt restructuring loans	9,540	9,622
Accrual Loan | Real estate - residential
Number of contracts	27	19
Troubled debt restructuring loans	8,068	6,555
Non-Accrual Loans
Number of contracts	3	11
Troubled debt restructuring loans	3,390	8,155
Non-Accrual Loans | Real estate - construction & development
Number of contracts		5
Troubled debt restructuring loans		2,122
Non-Accrual Loans | Real estate - commercial and farmland
Number of contracts	1	2
Troubled debt restructuring loans	2,770	4,737
Non-Accrual Loans | Real estate - residential
Number of contracts	2	4
Troubled debt restructuring loans	$ 620	$ 1,296