Quarterly report pursuant to Section 13 or 15(d)

LOANS (Loans By Performance Status) (Detail)

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LOANS (Loans By Performance Status) (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Financing Receivable Recorded Investment [Line Items]    
Loans $ 3,053,989 $ 2,858,868
Commercial Financial and Agricultural Financing Receivable [Member]
   
Financing Receivable Recorded Investment [Line Items]    
Loans 1,362,757 1,278,649
Commercial Real Estate Construction Financing Receivable [Member]
   
Financing Receivable Recorded Investment [Line Items]    
Loans 178,033 151,868
Commercial Mortgage Loans Owner Occupied [Member]
   
Financing Receivable Recorded Investment [Line Items]    
Loans 708,294 710,372
One To Four Family Mortgage Loans [Member]
   
Financing Receivable Recorded Investment [Line Items]    
Loans 296,220 278,621
Other Real Estate Mortgage Loans [Member]
   
Financing Receivable Recorded Investment [Line Items]    
Loans 457,845 391,396
Residential Real Estate Mortgage Loans [Member]
   
Financing Receivable Recorded Investment [Line Items]    
Loans 1,462,359 1,380,389
Consumer Portfolio Segment [Member]
   
Financing Receivable Recorded Investment [Line Items]    
Loans 50,840 47,962
Performing Financing Receivable [Member]
   
Financing Receivable Recorded Investment [Line Items]    
Loans 3,040,796 2,849,132
Performing Financing Receivable [Member] | Commercial Financial and Agricultural Financing Receivable [Member]
   
Financing Receivable Recorded Investment [Line Items]    
Loans 1,361,701 1,276,935
Performing Financing Receivable [Member] | Commercial Real Estate Construction Financing Receivable [Member]
   
Financing Receivable Recorded Investment [Line Items]    
Loans 170,432 148,118
Performing Financing Receivable [Member] | Commercial Mortgage Loans Owner Occupied [Member]
   
Financing Receivable Recorded Investment [Line Items]    
Loans 706,711 708,937
Performing Financing Receivable [Member] | One To Four Family Mortgage Loans [Member]
   
Financing Receivable Recorded Investment [Line Items]    
Loans 295,021 276,725
Performing Financing Receivable [Member] | Other Real Estate Mortgage Loans [Member]
   
Financing Receivable Recorded Investment [Line Items]    
Loans 456,886 391,153
Performing Financing Receivable [Member] | Residential Real Estate Mortgage Loans [Member]
   
Financing Receivable Recorded Investment [Line Items]    
Loans 1,458,618 1,376,815
Performing Financing Receivable [Member] | Consumer Portfolio Segment [Member]
   
Financing Receivable Recorded Investment [Line Items]    
Loans 50,045 47,264
Nonperforming Financing Receivable [Member]
   
Financing Receivable Recorded Investment [Line Items]    
Loans 13,193 9,736
Nonperforming Financing Receivable [Member] | Commercial Financial and Agricultural Financing Receivable [Member]
   
Financing Receivable Recorded Investment [Line Items]    
Loans 1,056 1,714
Nonperforming Financing Receivable [Member] | Commercial Real Estate Construction Financing Receivable [Member]
   
Financing Receivable Recorded Investment [Line Items]    
Loans 7,601 3,750
Nonperforming Financing Receivable [Member] | Commercial Mortgage Loans Owner Occupied [Member]
   
Financing Receivable Recorded Investment [Line Items]    
Loans 1,583 1,435
Nonperforming Financing Receivable [Member] | One To Four Family Mortgage Loans [Member]
   
Financing Receivable Recorded Investment [Line Items]    
Loans 1,199 1,896
Nonperforming Financing Receivable [Member] | Other Real Estate Mortgage Loans [Member]
   
Financing Receivable Recorded Investment [Line Items]    
Loans 959 243
Nonperforming Financing Receivable [Member] | Residential Real Estate Mortgage Loans [Member]
   
Financing Receivable Recorded Investment [Line Items]    
Loans 3,741 3,574
Nonperforming Financing Receivable [Member] | Consumer Portfolio Segment [Member]
   
Financing Receivable Recorded Investment [Line Items]    
Loans $ 795 $ 698