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, 2014
Mar. 31, 2013
Dec. 31, 2013
Allowance For Loan Losses      
Balance, beginning of year $ 30,663 $ 26,258  
Chargeoffs (1,307) (2,878)  
Recoveries 58 15  
Provision 2,314 4,284  
Balance, end of year 31,728 27,679  
Individually Evaluated for Impairment 7,111   6,270
Collectively Evaluated for Impairment 24,617   24,393
Ending Balance 2,937,797   2,858,868
Individually Evaluated for Impairment 34,207   31,966
Collectively Evaluated for Impairment 2,903,590   2,826,902
Commercial Financial and Agricultural Financing Receivable [Member]
      
Allowance For Loan Losses      
Balance, beginning of year 11,170 8,233  
Chargeoffs (1,222) (887)  
Recoveries 45 6  
Provision 987 1,599  
Balance, end of year 10,980 8,951  
Individually Evaluated for Impairment 1,422   1,992
Collectively Evaluated for Impairment 9,558   9,178
Ending Balance 1,306,058   1,278,649
Individually Evaluated for Impairment 3,450   3,827
Collectively Evaluated for Impairment 1,302,608   1,274,822
Commercial Real Estate Construction Financing Receivable [Member]
      
Allowance For Loan Losses      
Balance, beginning of year 5,809 6,511  
Chargeoffs (23) (1,990)  
Recoveries 8 7  
Provision 264 2,114  
Balance, end of year 6,058 6,642  
Individually Evaluated for Impairment 2,184   1,597
Collectively Evaluated for Impairment 3,874   4,212
Ending Balance 157,127   151,868
Individually Evaluated for Impairment 9,709   9,238
Collectively Evaluated for Impairment 147,418   142,630
Residential Real Estate Mortgage Loans [Member]
      
Allowance For Loan Losses      
Balance, beginning of year 7,495 4,912  
Chargeoffs (4) 0  
Recoveries 4 0  
Provision 642 825  
Balance, end of year 8,137 5,737  
Individually Evaluated for Impairment 2,703   1,982
Collectively Evaluated for Impairment 5,434   5,513
Ending Balance 1,424,826   1,380,389
Individually Evaluated for Impairment 20,246   18,202
Collectively Evaluated for Impairment 1,404,580   1,362,187
Consumer Portfolio Segment [Member]
      
Allowance For Loan Losses      
Balance, beginning of year 855 199  
Chargeoffs (58) (1)  
Recoveries 1 2  
Provision 153 (36)  
Balance, end of year 951 164  
Individually Evaluated for Impairment 802   699
Collectively Evaluated for Impairment 149   156
Ending Balance 49,786   47,962
Individually Evaluated for Impairment 802   699
Collectively Evaluated for Impairment 48,984   47,263
Qualitative Factors (Member)
      
Allowance For Loan Losses      
Balance, beginning of year 5,334 6,403  
Chargeoffs 0 0  
Recoveries 0 0  
Provision 268 (218)  
Balance, end of year 5,602 6,185  
Individually Evaluated for Impairment 0   0
Collectively Evaluated for Impairment 5,602   5,334
Ending Balance 0   0
Individually Evaluated for Impairment 0   0
Collectively Evaluated for Impairment $ 0   $ 0