Loans (Summary Of Past Due Financial Receivables (Non-Covered)) (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011
Loans 30-59 Days Past Due	$ 14,300		$ 37,200
Total Loans	1,365,489	1,332,086	1,360,063
Commercial, financial & agricultural
Total Loans	174,903	142,960	150,377
Real estate - construction & development
Total Loans	124,556	130,270	143,684
Real estate - commercial and farmland
Total Loans	675,404	672,765	681,228
Real estate - residential
Total Loans	332,124	330,727	336,485
Consumer installment loans
Total Loans	41,431	37,296	35,584
Other Loans
Total Loans	17,071	18,068	12,705
Non-Covered Loans
Loans 30-59 Days Past Due	14,009	16,376	16,309
Loans 60-89 Days Past Due	13,855	14,583	5,239
Loans 90 or More Days Past Due	36,722	64,135	57,458
Total Loans Past Due	64,587	95,094	79,006
Current Loans	1,300,902	1,236,992	1,281,057
Total Loans	1,365,489	1,332,086	1,360,063
Loans 90 Days or More Past Due and Still Accruing	1
Non-Covered Loans | Commercial, financial & agricultural
Loans 30-59 Days Past Due	531	1,103	653
Loans 60-89 Days Past Due	701	705	282
Loans 90 or More Days Past Due	4,371	3,975	5,334
Total Loans Past Due	5,603	5,783	6,269
Current Loans	169,300	137,177	144,108
Total Loans	174,903	142,960	150,377
Non-Covered Loans | Real estate - construction & development
Loans 30-59 Days Past Due	1,986	2,395	1,551
Loans 60-89 Days Past Due	2,119	1,507	1,243
Loans 90 or More Days Past Due	7,855	13,608	13,194
Total Loans Past Due	11,960	17,510	15,988
Current Loans	112,596	112,760	127,696
Total Loans	124,556	130,270	143,684
Non-Covered Loans | Real estate - commercial and farmland
Loans 30-59 Days Past Due	5,282	6,686	8,494
Loans 60-89 Days Past Due	6,930	7,071	807
Loans 90 or More Days Past Due	8,597	32,953	23,898
Total Loans Past Due	20,809	46,710	33,199
Current Loans	654,595	626,055	648,029
Total Loans	675,404	672,765	681,228
Non-Covered Loans | Real estate - residential
Loans 30-59 Days Past Due	5,665	5,229	5,086
Loans 60-89 Days Past Due	3,885	4,995	2,729
Loans 90 or More Days Past Due	14,782	12,874	14,539
Total Loans Past Due	24,332	23,098	22,354
Current Loans	307,792	307,629	314,131
Total Loans	332,124	330,727	336,485
Non-Covered Loans | Consumer installment loans
Loans 30-59 Days Past Due	545	963	525
Loans 60-89 Days Past Due	220	305	178
Loans 90 or More Days Past Due	1,117	725	493
Total Loans Past Due	1,883	1,993	1,196
Current Loans	39,548	35,303	34,388
Total Loans	41,431	37,296	35,584
Loans 90 Days or More Past Due and Still Accruing	1
Non-Covered Loans | Other Loans
Current Loans	17,071	18,068	12,705
Total Loans	$ 17,071	$ 18,068	$ 12,705