Quarterly report pursuant to Section 13 or 15(d)

LOANS (Analysis of Allowance For Loan Losses By Portfolio Segment) (Detail)

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LOANS (Analysis of Allowance For Loan Losses By Portfolio Segment) (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Allowance for loan losses:      
Balance, beginning of year $ 26,258 $ 22,030  
Chargeoffs 2,878 856  
Recoveries 15 105  
Provision 4,284 2,383  
Balance, end of year 27,679 23,662  
Individually Evaluated for Impairment 6,548   3,511
Collectively Evaluated for Impairment 21,131   22,747
Ending Balance 2,462,154   2,363,182
Individually Evaluated for Impairment 53,820   37,394
Collectively Evaluated for Impairment 2,408,334   2,325,788
Commercial Financial and Agricultural Financing Receivable [Member]
     
Allowance for loan losses:      
Balance, beginning of year 8,233 6,627  
Chargeoffs 887 287  
Recoveries 6 100  
Provision 1,599 185  
Balance, end of year 8,951 6,625  
Individually Evaluated for Impairment 982   577
Collectively Evaluated for Impairment 7,969   7,656
Ending Balance 1,090,877   1,030,990
Individually Evaluated for Impairment 5,044   3,910
Collectively Evaluated for Impairment 1,085,833   1,027,080
Commercial Real Estate Construction Financing Receivable [Member]
     
Allowance for loan losses:      
Balance, beginning of year 6,511 6,542  
Chargeoffs 1,990 417  
Recoveries 7 0  
Provision 2,114 1,482  
Balance, end of year 6,642 7,607  
Individually Evaluated for Impairment 2,915   1,013
Collectively Evaluated for Impairment 3,727   5,498
Ending Balance 162,190   158,361
Individually Evaluated for Impairment 26,767   14,422
Collectively Evaluated for Impairment 135,423   143,939
Residential Real Estate Mortgage Loans [Member]
     
Allowance for loan losses:      
Balance, beginning of year 4,912 3,295  
Chargeoffs 0 60  
Recoveries 0 2  
Provision 825 656  
Balance, end of year 5,737 3,893  
Individually Evaluated for Impairment 2,651   1,921
Collectively Evaluated for Impairment 3,086   1,127,549
Ending Balance 1,168,829   1,127,549
Individually Evaluated for Impairment 21,852   18,927
Collectively Evaluated for Impairment 1,146,977   1,108,622
Consumer Portfolio Segment [Member]
     
Allowance for loan losses:      
Balance, beginning of year 199 531  
Chargeoffs 1 92  
Recoveries 2 3  
Provision (36) 68  
Balance, end of year 164 510  
Individually Evaluated for Impairment 0   0
Collectively Evaluated for Impairment 164   199
Ending Balance 40,258   46,282
Individually Evaluated for Impairment 157   135
Collectively Evaluated for Impairment 40,101   46,147
Unallocated Financing Receivables [Member]
     
Allowance for loan losses:      
Balance, beginning of year 6,403 5,035  
Chargeoffs 0 0  
Recoveries 0 0  
Provision (218) (8)  
Balance, end of year 6,185 5,027  
Individually Evaluated for Impairment 0   0
Collectively Evaluated for Impairment 6,185   6,403
Ending Balance 0   0
Individually Evaluated for Impairment 0   0
Collectively Evaluated for Impairment $ 0   $ 0