Quarterly report pursuant to Section 13 or 15(d)

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

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LOANS (Analysis of Allowance For Loan Losses By Portfolio Segment) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Allowance for loan losses:          
Balance, beginning of year $ 46,998 $ 40,020 $ 43,419 [1] $ 35,629  
Charge-offs (1,574) (545) (4,012) (2,913)  
Recoveries 45 27 203 319  
Provision 3,464 3,072 9,323 9,539  
Balance, end of year 48,933 42,574 48,933 42,574  
Individually Evaluated for Impairment 7,940   7,940   $ 5,683
Collectively Evaluated for Impairment 40,993   40,993   37,736
Ending Balance 4,657,284   4,657,284   4,216,375 [1]
Individually Evaluated for Impairment 78,555   78,555   33,491
Collectively Evaluated for Impairment 4,578,729   4,578,729   4,182,884
Commercial Financial and Agricultural Financing Receivable [Member]          
Allowance for loan losses:          
Balance, beginning of year 23,655 19,052 21,495 16,079  
Charge-offs (1,270) (388) (2,732) (1,616)  
Recoveries 35 13 39 38  
Provision 3,560 2,020 7,178 6,196  
Balance, end of year 25,980 20,697 25,980 20,697  
Individually Evaluated for Impairment 5,120   5,120   2,698
Collectively Evaluated for Impairment 20,860   20,860   18,797
Ending Balance 1,910,777   1,910,777   1,760,479
Individually Evaluated for Impairment 34,490   34,490   11,513
Collectively Evaluated for Impairment 1,876,287   1,876,287   1,748,966
Construction Loans [Member] | Commercial Real Estate Portfolio Segment [Member]          
Allowance for loan losses:          
Balance, beginning of year 5,279 5,674 5,432 6,395  
Charge-offs (79) (31) (815) (506)  
Recoveries 9 13 64 177  
Provision (394) (237) 134 (647)  
Balance, end of year 4,815 5,419 4,815 5,419  
Individually Evaluated for Impairment 940   940   1,223
Collectively Evaluated for Impairment 3,875   3,875   4,209
Ending Balance 292,721   292,721   243,267
Individually Evaluated for Impairment 9,875   9,875   4,052
Collectively Evaluated for Impairment 282,846   282,846   239,215
Residential Real Estate Mortgage Loans [Member]          
Allowance for loan losses:          
Balance, beginning of year 17,600 14,171 16,061 12,112  
Charge-offs (144) 0 (335) (641)  
Recoveries 1 1 100 104  
Provision 282 1,767 1,913 4,364  
Balance, end of year 17,739 15,939 17,739 15,939  
Individually Evaluated for Impairment 1,880   1,880   1,730
Collectively Evaluated for Impairment 15,859   15,859   14,331
Ending Balance 2,398,829   2,398,829   2,157,582
Individually Evaluated for Impairment 34,187   34,187   17,880
Collectively Evaluated for Impairment 2,364,642   2,364,642   2,139,702
Consumer Portfolio Segment [Member]          
Allowance for loan losses:          
Balance, beginning of year 464 1,123 431 1,043  
Charge-offs (81) (126) (130) (150)  
Recoveries 0 0 0 0  
Provision 16 (478) 98 (374)  
Balance, end of year 399 $ 519 399 $ 519  
Individually Evaluated for Impairment 0   0   32
Collectively Evaluated for Impairment 399   399   399
Ending Balance 54,957   54,957   55,047
Individually Evaluated for Impairment 3   3   46
Collectively Evaluated for Impairment $ 54,954   $ 54,954   $ 55,001
[1] Derived from audited financial statements.