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
Jun. 30, 2018
Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Greater than 90 Days and still Accruing $ 6,921 $ 3,532
Total Loans 9,290,259 7,141,552
Nonaccrual 25,662 21,743
Current 9,124,900 7,053,016
Purchased Impaired    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 101,524 39,021
Current 86,007 35,418
30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 21,030 16,873
60 to 89 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 10,222 7,367
Construction and Land Development    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Greater than 90 Days and still Accruing 144 1,340
Total Loans 1,250,448 948,791
Nonaccrual 6,485 5,610
Current 1,237,696 936,857
Construction and Land Development | Purchased Impaired    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 5,183 2,838
Current 3,860 2,773
Construction and Land Development | 30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 648 1,248
Construction and Land Development | 60 to 89 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 292 898
Commercial Real Estate - Owner Occupied    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Greater than 90 Days and still Accruing 2,512 0
Total Loans 1,293,791 943,933
Nonaccrual 2,845 2,708
Current 1,256,120 925,910
Commercial Real Estate - Owner Occupied | Purchased Impaired    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 26,720 14,790
Current 22,523 13,931
Commercial Real Estate - Owner Occupied | 30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 3,775 444
Commercial Real Estate - Owner Occupied | 60 to 89 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 1,819 81
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 2,318,589 1,713,659
Nonaccrual 3,068 2,992
Current 2,290,797 1,703,592
Commercial Real Estate - Non-Owner Occupied | Purchased Impaired    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 24,680 6,610
Current 22,387 6,189
Commercial Real Estate - Non-Owner Occupied | 30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 44 187
Commercial Real Estate - Non-Owner Occupied | 60 to 89 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 0 84
Multifamily Real Estate    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Greater than 90 Days and still Accruing 0 0
Total Loans 541,730 357,079
Nonaccrual 0 0
Current 541,560 356,999
Multifamily Real Estate | Purchased Impaired    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 84 80
Current 84 80
Multifamily Real Estate | 30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 86 0
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 100 214
Total Loans 1,093,771 612,023
Nonaccrual 1,387 316
Current 1,086,945 609,829
Commercial & Industrial | Purchased Impaired    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 1,851 408
Current 1,315 408
Commercial & Industrial | 30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 1,921 1,147
Commercial & Industrial | 60 to 89 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 1,567 109
Residential 1-4 Family - Commercial    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Greater than 90 Days and still Accruing 132 579
Total Loans 723,945 612,395
Nonaccrual 1,998 1,085
Current 701,618 598,935
Residential 1-4 Family - Commercial | Purchased Impaired    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 17,227 9,414
Current 14,890 8,630
Residential 1-4 Family - Commercial | 30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 2,216 1,682
Residential 1-4 Family - Commercial | 60 to 89 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 754 700
Residential 1-4 Family - Mortgage    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Greater than 90 Days and still Accruing 2,669 546
Total Loans 607,155 485,690
Nonaccrual 7,552 6,269
Current 571,018 468,763
Residential 1-4 Family - Mortgage | Purchased Impaired    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 18,002 3,733
Current 14,256 2,764
Residential 1-4 Family - Mortgage | 30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 4,926 3,838
Residential 1-4 Family - Mortgage | 60 to 89 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 2,988 2,541
Auto    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Greater than 90 Days and still Accruing 121 40
Total Loans 296,706 282,474
Nonaccrual 463 413
Current 293,505 278,295
Auto | Purchased Impaired    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 11 0
Current 11  
Auto | 30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 2,187 3,541
Auto | 60 to 89 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 419 185
HELOC    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Greater than 90 Days and still Accruing 570 217
Total Loans 626,916 537,521
Nonaccrual 1,669 2,075
Current 613,660 531,180
HELOC | Purchased Impaired    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 6,890 950
Current 5,826 445
HELOC | 30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 2,505 2,382
HELOC | 60 to 89 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 1,622 717
Consumer and all other    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Greater than 90 Days and still Accruing 673 402
Total Loans 537,208 647,987
Nonaccrual 195 275
Current 531,981 642,656
Consumer and all other | Purchased Impaired    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 876 198
Current 855 198
Consumer and all other | 30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 2,722 2,404
Consumer and all other | 60 to 89 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due $ 761 $ 2,052