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Allowance for Loan Losses and Recorded Investment in PCI Loans, by Loan Pool (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]    
Acquired Impaired Loans Evaluated for Impairment $ 81,711 $ 141,340
Allowance for Acquired Impaired Loans Evaluated 755 8
Commercial Loans
    
Financing Receivable, Recorded Investment [Line Items]    
Acquired Impaired Loans Evaluated for Impairment 32,238 76,707
Allowance for Acquired Impaired Loans Evaluated 77 8
Commercial Loans | Waccamaw Commercial
    
Financing Receivable, Recorded Investment [Line Items]    
Acquired Impaired Loans Evaluated for Impairment 19,851 40,688
Commercial Loans | Waccamaw Lines Of Credit
    
Financing Receivable, Recorded Investment [Line Items]    
Acquired Impaired Loans Evaluated for Impairment 2,594 10,009
Allowance for Acquired Impaired Loans Evaluated 69  
Commercial Loans | Peoples Commercial
    
Financing Receivable, Recorded Investment [Line Items]    
Acquired Impaired Loans Evaluated for Impairment 7,862 23,670
Commercial Loans | Commercial Loan Other
    
Financing Receivable, Recorded Investment [Line Items]    
Acquired Impaired Loans Evaluated for Impairment 1,931 2,340
Allowance for Acquired Impaired Loans Evaluated 8 8
Consumer Real Estate
    
Financing Receivable, Recorded Investment [Line Items]    
Acquired Impaired Loans Evaluated for Impairment 49,439 64,532
Allowance for Acquired Impaired Loans Evaluated 678  
Consumer Real Estate | Waccamaw Serviced Home Equity Lines
    
Financing Receivable, Recorded Investment [Line Items]    
Acquired Impaired Loans Evaluated for Impairment 43,608 52,321
Allowance for Acquired Impaired Loans Evaluated 277  
Consumer Real Estate | Waccamaw Residential
    
Financing Receivable, Recorded Investment [Line Items]    
Acquired Impaired Loans Evaluated for Impairment 4,497 8,974
Allowance for Acquired Impaired Loans Evaluated 217  
Consumer Real Estate | Peoples Residential
    
Financing Receivable, Recorded Investment [Line Items]    
Acquired Impaired Loans Evaluated for Impairment 1,334 3,237
Allowance for Acquired Impaired Loans Evaluated 184  
Consumer and Other
    
Financing Receivable, Recorded Investment [Line Items]    
Acquired Impaired Loans Evaluated for Impairment 34 101
Consumer and Other | Waccamaw Consumer
    
Financing Receivable, Recorded Investment [Line Items]    
Acquired Impaired Loans Evaluated for Impairment $ 34 $ 101