Quarterly report pursuant to Section 13 or 15(d)

Analysis Of Troubled Debt Restructuring (Detail)

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Analysis Of Troubled Debt Restructuring (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Contract
Mar. 31, 2012
Contract
Dec. 31, 2011
Jun. 30, 2011
Contract
Financing Receivable, Modifications [Line Items]        
Number of Contracts 26     13
Pre- Modification Outstanding Recorded Investment $ 8,439     $ 5,797
Post- Modification Outstanding Recorded Investment 8,439   4,500 5,797
Number of Contracts 3 3    
Recorded Investment 2,786 2,800    
Commercial, financial and agricultural
        
Financing Receivable, Modifications [Line Items]        
Number of Contracts 2     10
Pre- Modification Outstanding Recorded Investment 1,263     2,440
Post- Modification Outstanding Recorded Investment 1,263     2,440
Real estate - construction
        
Financing Receivable, Modifications [Line Items]        
Number of Contracts 15      
Pre- Modification Outstanding Recorded Investment 2,377      
Post- Modification Outstanding Recorded Investment 2,377      
Owner-occupied commercial
        
Financing Receivable, Modifications [Line Items]        
Number of Contracts 3     2
Pre- Modification Outstanding Recorded Investment 2,786     3,017
Post- Modification Outstanding Recorded Investment 2,786     3,017
Number of Contracts 3      
Recorded Investment 2,786      
1-4 family mortgage
        
Financing Receivable, Modifications [Line Items]        
Number of Contracts 5      
Pre- Modification Outstanding Recorded Investment 1,709      
Post- Modification Outstanding Recorded Investment 1,709      
Other mortgage
        
Financing Receivable, Modifications [Line Items]        
Number of Contracts 1     1
Pre- Modification Outstanding Recorded Investment 304     340
Post- Modification Outstanding Recorded Investment 304     340
Real estate - mortgage
        
Financing Receivable, Modifications [Line Items]        
Number of Contracts 9     3
Pre- Modification Outstanding Recorded Investment 4,799     3,357
Post- Modification Outstanding Recorded Investment 4,799     3,357
Number of Contracts 3      
Recorded Investment $ 2,786