Quarterly report pursuant to Section 13 or 15(d)

LOANS AND ALLOWANCE FOR LOAN LOSSES (Summary of Aging of the Loan Portfolio by Segment) (Details)

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LOANS AND ALLOWANCE FOR LOAN LOSSES (Summary of Aging of the Loan Portfolio by Segment) (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Mar. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater than 90 Days and still Accruing $ 2,323 $ 3,005  
Total Loans 6,554,046 6,307,060 $ 5,780,502
Nonaccrual 22,338 9,973  
Current 6,447,081 6,209,924  
Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 57,770 59,292 70,105
Current 52,357 55,244  
30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 19,853 20,245  
60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 4,681 4,621  
Construction and Land Development      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater than 90 Days and still Accruing 16 76  
Total Loans 770,287 751,131 776,698
Nonaccrual 6,545 2,037  
Current 759,944 744,702  
Construction and Land Development | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 2,776 2,922 5,137
Current 2,704 2,838  
Construction and Land Development | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 630 1,162  
Construction and Land Development | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 376 232  
Commercial Real Estate - Owner Occupied      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater than 90 Days and still Accruing 93 35  
Total Loans 870,559 857,805 849,202
Nonaccrual 1,298 794  
Current 850,091 836,682  
Commercial Real Estate - Owner Occupied | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 18,199 18,343 27,260
Current 16,980 17,553  
Commercial Real Estate - Owner Occupied | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 878 1,842  
Commercial Real Estate - Owner Occupied | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 0 109  
Commercial Real Estate - Non-Owner Occupied      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater than 90 Days and still Accruing 711 0  
Total Loans 1,631,767 1,564,295 1,296,251
Nonaccrual 2,798 0  
Current 1,610,046 1,544,623  
Commercial Real Estate - Non-Owner Occupied | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 16,725 17,303 13,636
Current 15,397 16,768  
Commercial Real Estate - Non-Owner Occupied | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 1,487 2,369  
Commercial Real Estate - Non-Owner Occupied | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 0 0  
Multifamily Real Estate      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater than 90 Days and still Accruing 0 0  
Total Loans 353,769 334,276 323,270
Nonaccrual 0 0  
Current 351,711 332,063  
Multifamily Real Estate | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 2,058 2,066 2,132
Current 2,058 2,066  
Multifamily Real Estate | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 0 147  
Multifamily Real Estate | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 0 0  
Commercial & Industrial      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater than 90 Days and still Accruing 0 9  
Total Loans 576,567 551,526 453,208
Nonaccrual 3,245 124  
Current 572,010 548,702  
Commercial & Industrial | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 733 1,074 1,571
Current 721 974  
Commercial & Industrial | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 453 759  
Commercial & Industrial | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 126 858  
Residential 1-4 Family      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater than 90 Days and still Accruing 686 2,048  
Total Loans 1,057,439 1,029,547 978,478
Nonaccrual 5,856 5,279  
Current 1,021,268 998,448  
Residential 1-4 Family | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 15,910 16,200 18,305
Current 13,362 13,957  
Residential 1-4 Family | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 11,615 7,038  
Residential 1-4 Family | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 2,104 534  
Auto      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater than 90 Days and still Accruing 11 111  
Total Loans 271,466 262,071 241,737
Nonaccrual 393 169  
Current 269,278 258,904  
Auto | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 0 0 0
Auto | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 1,534 2,570  
Auto | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 250 317  
HELOC      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater than 90 Days and still Accruing 680 635  
Total Loans 527,863 526,884 517,122
Nonaccrual 1,902 1,279  
Current 522,270 520,833  
HELOC | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 1,156 1,161 1,535
Current 922 865  
HELOC | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 1,490 1,836  
HELOC | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 365 1,140  
Consumer and all other      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater than 90 Days and still Accruing 126 91  
Total Loans 494,329 429,525 344,536
Nonaccrual 301 291  
Current 490,463 424,967  
Consumer and all other | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 213 223 $ 529
Current 213 223  
Consumer and all other | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 1,766 2,522  
Consumer and all other | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due $ 1,460 $ 1,431