Quarterly report pursuant to Section 13 or 15(d)

Loans By Credit Quality Indicator (Detail)

v2.4.0.6
Loans By Credit Quality Indicator (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Financing Receivable, Recorded Investment [Line Items]    
Loans $ 2,022,589 $ 1,830,742
Commercial, financial and agricultural
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 856,823 799,464
Real estate - construction
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 148,486 151,218
Owner-occupied commercial
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 490,204 398,601
1-4 family mortgage
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 229,036 205,182
Other mortgage
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 254,295 235,251
Real estate - mortgage
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 973,535 839,034
Consumer
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 43,745 41,026
Pass
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 1,939,068 1,742,205
Pass | Commercial, financial and agricultural
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 840,432 780,270
Pass | Real estate - construction
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 117,852 117,244
Pass | Owner-occupied commercial
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 477,066 385,084
Pass | 1-4 family mortgage
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 216,338 194,447
Pass | Other mortgage
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 243,987 224,807
Pass | Real estate - mortgage
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 937,391 804,338
Pass | Consumer
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 43,393 40,353
Special Mention
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 39,355 45,545
Special Mention | Commercial, financial and agricultural
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 10,379 11,775
Special Mention | Real estate - construction
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 8,295 14,472
Special Mention | Owner-occupied commercial
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 7,097 7,333
Special Mention | 1-4 family mortgage
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 6,614 4,835
Special Mention | Other mortgage
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 6,884 7,034
Special Mention | Real estate - mortgage
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 20,595 19,202
Special Mention | Consumer
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 86 96
Substandard
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 44,166 42,992
Substandard | Commercial, financial and agricultural
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 6,012 7,419
Substandard | Real estate - construction
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 22,339 19,502
Substandard | Owner-occupied commercial
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 6,041 6,184
Substandard | 1-4 family mortgage
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 6,084 5,900
Substandard | Other mortgage
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 3,424 3,410
Substandard | Real estate - mortgage
   
Financing Receivable, Recorded Investment [Line Items]    
Loans 15,549 15,494
Substandard | Consumer
   
Financing Receivable, Recorded Investment [Line Items]    
Loans $ 266 $ 577