Annual report pursuant to Section 13 and 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
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater Than 90 Days and Still Accruing $ 8,856 $ 3,532  
Total Loans 9,716,207 7,141,552  
Nonaccrual 26,953 21,743 $ 10,000
Current 9,537,156 7,053,016  
30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 41,434 16,873  
60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 11,587 7,367  
Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 90,221 39,021  
Current 71,213 35,418  
Construction and Land Development      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater Than 90 Days and Still Accruing 180 1,340  
Total Loans 1,194,821 948,791  
Nonaccrual 8,018 5,610  
Current 1,177,204 936,857  
Construction and Land Development | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 759 1,248  
Construction and Land Development | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 6 898  
Construction and Land Development | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 8,654 2,838  
Current 7,122 2,773  
Commercial Real Estate - Owner Occupied      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater Than 90 Days and Still Accruing 3,193 0  
Total Loans 1,337,345 943,933  
Nonaccrual 3,636 2,708  
Current 1,294,975 925,910  
Commercial Real Estate - Owner Occupied | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 8,755 444  
Commercial Real Estate - Owner Occupied | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 1,142 81  
Commercial Real Estate - Owner Occupied | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 25,644 14,790  
Current 20,705 13,931  
Commercial Real Estate - Non-Owner Occupied      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater Than 90 Days and Still Accruing 0 194  
Total Loans 2,467,410 1,713,659  
Nonaccrual 1,789 2,992  
Current 2,447,907 1,703,592  
Commercial Real Estate - Non-Owner Occupied | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 338 187  
Commercial Real Estate - Non-Owner Occupied | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 41 84  
Commercial Real Estate - Non-Owner Occupied | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 17,335 6,610  
Current 15,464 6,189  
Multifamily Real Estate      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater Than 90 Days and Still Accruing 0 0  
Total Loans 548,231 357,079  
Nonaccrual 0 0  
Current 547,997 356,999  
Multifamily Real Estate | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 0 0  
Multifamily Real Estate | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 146 0  
Multifamily Real Estate | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 88 80  
Current 88 80  
Commercial and Industrial      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater Than 90 Days and Still Accruing 132 214  
Total Loans 1,317,135 612,023  
Nonaccrual 1,524 316  
Current 1,309,581 609,829  
Commercial and Industrial | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 3,353 1,147  
Commercial and Industrial | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 389 109  
Commercial and Industrial | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 2,156 408  
Current 1,017 408  
Residential 1-4 Family - Commercial      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater Than 90 Days and Still Accruing 1,409 579  
Total Loans 713,750 612,395  
Nonaccrual 2,481 1,085  
Current 687,957 598,935  
Residential 1-4 Family - Commercial | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 6,619 1,682  
Residential 1-4 Family - Commercial | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 1,577 700  
Residential 1-4 Family - Commercial | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 13,707 9,414  
Current 9,312 8,630  
Residential 1-4 Family - Mortgage      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater Than 90 Days and Still Accruing 2,437 546  
Total Loans 600,578 485,690  
Nonaccrual 7,276 6,269  
Current 556,907 468,763  
Residential 1-4 Family - Mortgage | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 12,049 3,838  
Residential 1-4 Family - Mortgage | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 5,143 2,541  
Residential 1-4 Family - Mortgage | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 16,766 3,733  
Current 12,455 2,764  
Auto      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater Than 90 Days and Still Accruing 195 40  
Total Loans 301,943 282,474  
Nonaccrual 576 413  
Current 297,442 278,295  
Auto | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 3,320 3,541  
Auto | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 403 185  
Auto | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 7 0  
Current 7    
HELOC      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater Than 90 Days and Still Accruing 440 217  
Total Loans 613,383 537,521  
Nonaccrual 1,518 2,075  
Current 600,055 531,180  
HELOC | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 4,611 2,382  
HELOC | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 1,644 717  
HELOC | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 5,115 950  
Current 4,365 445  
Consumer and all other      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater Than 90 Days and Still Accruing 870 402  
Total Loans 621,611 647,987  
Nonaccrual 135 275  
Current 617,131 642,656  
Consumer and all other | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 1,630 2,404  
Consumer and all other | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 1,096 2,052  
Consumer and all other | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 749 198  
Current $ 678 $ 198