Loans (Summary Of Trouble Debt Restructuring By Loan Class) (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Troubled debt restructuring loans	$ 28,200	$ 26,100
Accrual Loan
Number of contracts	45	39
Troubled debt restructuring loans	22,970	17,951
Accrual Loan | Real estate - construction & development
Number of contracts	5	6
Troubled debt restructuring loans	1,205	1,774
Accrual Loan | Real estate - commercial and farmland
Number of contracts	16	14
Troubled debt restructuring loans	13,293	9,622
Accrual Loan | Real estate - residential
Number of contracts	24	19
Troubled debt restructuring loans	8,472	6,555
Non-Accrual Loans
Number of contracts	10	11
Troubled debt restructuring loans	5,170	8,155
Non-Accrual Loans | Commercial, financial & agricultural
Number of contracts	1
Troubled debt restructuring loans	18
Non-Accrual Loans | Real estate - construction & development
Number of contracts	2	5
Troubled debt restructuring loans	1,124	2,122
Non-Accrual Loans | Real estate - commercial and farmland
Number of contracts	2	2
Troubled debt restructuring loans	2,815	4,737
Non-Accrual Loans | Real estate - residential
Number of contracts	5	4
Troubled debt restructuring loans	$ 1,213	$ 1,296