Loans (Summary Of Past Due Financial Receivables (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
Covered Loan
Loans 30-59 Days Past Due	21,427	25,306	9,087
Loans 60-89 Days Past Due	14,637	15,922	11,228
Loans 90 or More Days Past Due	130,640	139,601	125,864
Total Loans Past Due	166,704	180,829	146,179
Current Loans	435,033	390,660	340,310
Total Loans	601,737	571,489	486,489
Loans 90 Days or More Past Due and Still Accruing	1,267	455	3,055
Covered Loan | Commercial, financial & agricultural
Loans 30-59 Days Past Due	851	968	1,201
Loans 60-89 Days Past Due	754	4,297	635
Loans 90 or More Days Past Due	12,703	11,253	11,047
Total Loans Past Due	14,308	16,518	12,883
Current Loans	27,064	25,349	29,611
Total Loans	41,372	41,867	42,494
Loans 90 Days or More Past Due and Still Accruing	298		313
Covered Loan | Real estate - construction & development
Loans 30-59 Days Past Due	2,688	2,444	1,424
Loans 60-89 Days Past Due	3,007	1,318	1,068
Loans 90 or More Days Past Due	25,021	27,867	28,531
Total Loans Past Due	30,716	31,629	31,023
Current Loans	53,275	45,448	48,517
Total Loans	83,991	77,077	79,540
Loans 90 Days or More Past Due and Still Accruing			75
Covered Loan | Real estate - commercial and farmland
Loans 30-59 Days Past Due	12,452	18,282	3,941
Loans 60-89 Days Past Due	7,656	8,544	6,075
Loans 90 or More Days Past Due	60,879	64,091	52,287
Total Loans Past Due	80,987	90,917	62,303
Current Loans	241,406	230,340	167,621
Total Loans	322,393	321,257	229,924
Loans 90 Days or More Past Due and Still Accruing	891	165	2,223
Covered Loan | Real estate - residential
Loans 30-59 Days Past Due	5,366	3,485	2,445
Loans 60-89 Days Past Due	3,180	1,493	3,403
Loans 90 or More Days Past Due	31,607	35,950	33,354
Total Loans Past Due	40,153	40,928	39,202
Current Loans	110,530	86,716	90,519
Total Loans	150,683	127,644	129,721
Loans 90 Days or More Past Due and Still Accruing	78	290	444
Covered Loan | Consumer installment loans
Loans 30-59 Days Past Due	70	127	76
Loans 60-89 Days Past Due	40	270	47
Loans 90 or More Days Past Due	430	440	645
Total Loans Past Due	540	837	768
Current Loans	2,758	2,807	4,042
Total Loans	$ 3,298	$ 3,644	$ 4,810