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
Sep. 30, 2018
Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Greater than 90 Days and still Accruing $ 9,532 $ 3,532
Total Loans 9,411,598 7,141,552
Nonaccrual 28,110 21,743
Current 9,242,170 7,053,016
Purchased Impaired    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 94,746 39,021
Current 75,851 35,418
30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 25,731 16,873
60 to 89 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 11,309 7,367
Construction and Land Development    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Greater than 90 Days and still Accruing 442 1,340
Total Loans 1,178,054 948,791
Nonaccrual 9,221 5,610
Current 1,160,172 936,857
Construction and Land Development | Purchased Impaired    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 5,042 2,838
Current 3,640 2,773
Construction and Land Development | 30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 1,351 1,248
Construction and Land Development | 60 to 89 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 1,826 898
Commercial Real Estate - Owner Occupied    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Greater than 90 Days and still Accruing 3,586 0
Total Loans 1,283,125 943,933
Nonaccrual 3,202 2,708
Current 1,245,684 925,910
Commercial Real Estate - Owner Occupied | Purchased Impaired    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 25,896 14,790
Current 21,974 13,931
Commercial Real Estate - Owner Occupied | 30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 4,218 444
Commercial Real Estate - Owner Occupied | 60 to 89 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 539 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 2,427,251 1,713,659
Nonaccrual 1,812 2,992
Current 2,403,372 1,703,592
Commercial Real Estate - Non-Owner Occupied | Purchased Impaired    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 21,575 6,610
Current 19,731 6,189
Commercial Real Estate - Non-Owner Occupied | 30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 492 187
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 542,662 357,079
Nonaccrual 0 0
Current 542,023 356,999
Multifamily Real Estate | Purchased Impaired    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 86 80
Current 86 80
Multifamily Real Estate | 30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 553 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 256 214
Total Loans 1,154,583 612,023
Nonaccrual 1,404 316
Current 1,147,957 609,829
Commercial & Industrial | Purchased Impaired    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 2,299 408
Current 1,165 408
Commercial & Industrial | 30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 2,239 1,147
Commercial & Industrial | 60 to 89 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 428 109
Residential 1-4 Family - Commercial    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Greater than 90 Days and still Accruing 378 579
Total Loans 719,798 612,395
Nonaccrual 1,956 1,085
Current 696,964 598,935
Residential 1-4 Family - Commercial | Purchased Impaired    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 16,073 9,414
Current 10,385 8,630
Residential 1-4 Family - Commercial | 30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 2,535 1,682
Residential 1-4 Family - Commercial | 60 to 89 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 1,892 700
Residential 1-4 Family - Mortgage    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Greater than 90 Days and still Accruing 2,543 546
Total Loans 611,728 485,690
Nonaccrual 8,535 6,269
Current 575,590 468,763
Residential 1-4 Family - Mortgage | Purchased Impaired    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 16,761 3,733
Current 12,693 2,764
Residential 1-4 Family - Mortgage | 30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 4,506 3,838
Residential 1-4 Family - Mortgage | 60 to 89 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 3,793 2,541
Auto    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Greater than 90 Days and still Accruing 211 40
Total Loans 306,196 282,474
Nonaccrual 525 413
Current 302,738 278,295
Auto | Purchased Impaired    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 9 0
Current 9  
Auto | 30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 2,414 3,541
Auto | 60 to 89 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 299 185
HELOC    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Greater than 90 Days and still Accruing 1,291 217
Total Loans 612,116 537,521
Nonaccrual 1,273 2,075
Current 597,198 531,180
HELOC | Purchased Impaired    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 6,179 950
Current 5,395 445
HELOC | 30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 4,783 2,382
HELOC | 60 to 89 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 1,392 717
Consumer and all other    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Greater than 90 Days and still Accruing 825 402
Total Loans 576,085 647,987
Nonaccrual 182 275
Current 570,472 642,656
Consumer and all other | Purchased Impaired    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 826 198
Current 773 198
Consumer and all other | 30 to 59 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due 2,640 2,404
Consumer and all other | 60 to 89 Days Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Past Due $ 1,140 $ 2,052