Loans (Summary Of Troubled Debt Restructuring By Loan Class, Classified Separately Under Terms) (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012 Contract	Dec. 31, 2011 Contract
Loans Currently Paying Under Restructured Terms
Number of contracts	50	42
Troubled debt restructuring loans	$ 26,960	$ 21,454
Loans Currently Paying Under Restructured Terms | Commercial, financial & agricultural
Number of contracts	1
Troubled debt restructuring loans	18
Loans Currently Paying Under Restructured Terms | Real estate - construction & development
Number of contracts	6	7
Troubled debt restructuring loans	2,305	2,897
Loans Currently Paying Under Restructured Terms | Real estate - commercial and farmland
Number of contracts	18	15
Troubled debt restructuring loans	16,108	11,695
Loans Currently Paying Under Restructured Terms | Real estate - residential
Number of contracts	25	20
Troubled debt restructuring loans	8,529	6,862
Loans that have Defaulted Under Restructured Terms
Number of contracts	5	8
Troubled debt restructuring loans	1,180	4,652
Loans that have Defaulted Under Restructured Terms | Real estate - construction & development
Number of contracts	1	4
Troubled debt restructuring loans	24	999
Loans that have Defaulted Under Restructured Terms | Real estate - commercial and farmland
Number of contracts		1
Troubled debt restructuring loans		2,664
Loans that have Defaulted Under Restructured Terms | Real estate - residential
Number of contracts	4	3
Troubled debt restructuring loans	$ 1,156	$ 989