Loans (Summary Of Troubled Debt Restructuring By Loan Class, Classified Separately Under Terms) (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012 Contract	Dec. 31, 2011 Contract
Loans Currently Paying Under Restructured Terms
Number of contracts	50	42
Troubled debt restructuring loans	$ 19,893	$ 21,454
Loans Currently Paying Under Restructured Terms | Commercial, financial & agricultural
Number of contracts	5
Troubled debt restructuring loans	804
Loans Currently Paying Under Restructured Terms | Real estate - construction & development
Number of contracts	4	7
Troubled debt restructuring loans	1,481	2,897
Loans Currently Paying Under Restructured Terms | Real estate - commercial and farmland
Number of contracts	15	15
Troubled debt restructuring loans	9,540	11,695
Loans Currently Paying Under Restructured Terms | Real estate - residential
Number of contracts	26	20
Troubled debt restructuring loans	8,068	6,862
Loans that have Defaulted Under Restructured Terms
Number of contracts	4	8
Troubled debt restructuring loans	3,390	4,652
Loans that have Defaulted Under Restructured Terms | Real estate - construction & development
Number of contracts		4
Troubled debt restructuring loans		999
Loans that have Defaulted Under Restructured Terms | Real estate - commercial and farmland
Number of contracts	1	1
Troubled debt restructuring loans	2,770	2,664
Loans that have Defaulted Under Restructured Terms | Real estate - residential
Number of contracts	3	3
Troubled debt restructuring loans	$ 620	$ 989