Annual report pursuant to Section 13 and 15(d)

LOANS AND ALLOWANCE FOR LOAN LOSSES (Loans Receivables Related Risk Rating Including Purchased Impaired Loans) (Details)

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LOANS AND ALLOWANCE FOR LOAN LOSSES (Loans Receivables Related Risk Rating Including Purchased Impaired Loans) (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]    
Total Loans $ 9,716,207 $ 7,141,552
Construction and Land Development    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 1,194,821 948,791
Commercial Real Estate - Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 1,337,345 943,933
Commercial Real Estate - Non-Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 2,467,410 1,713,659
Multifamily Real Estate    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 548,231 357,079
Commercial and Industrial    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 1,317,135 612,023
Residential 1-4 Family - Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 713,750 612,395
Residential 1-4 Family - Mortgage    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 600,578 485,690
Auto    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 301,943 282,474
HELOC    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 613,383 537,521
Consumer and all other    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 621,611 647,987
Purchased Impaired    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 90,221 39,021
Purchased Impaired | Construction and Land Development    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 8,654 2,838
Purchased Impaired | Commercial Real Estate - Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 25,644 14,790
Purchased Impaired | Commercial Real Estate - Non-Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 17,335 6,610
Purchased Impaired | Multifamily Real Estate    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 88 80
Purchased Impaired | Commercial and Industrial    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 2,156 408
Purchased Impaired | Residential 1-4 Family - Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 13,707 9,414
Purchased Impaired | Residential 1-4 Family - Mortgage    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 16,766 3,733
Purchased Impaired | Auto    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 7 0
Purchased Impaired | HELOC    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 5,115 950
Purchased Impaired | Consumer and all other    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 749 198
Purchased Impaired | Pass    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 35,658 19,017
Purchased Impaired | Pass | Construction and Land Development    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 1,835 1,462
Purchased Impaired | Pass | Commercial Real Estate - Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 8,347 4,958
Purchased Impaired | Pass | Commercial Real Estate - Non-Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 4,789 3,920
Purchased Impaired | Pass | Multifamily Real Estate    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 0 0
Purchased Impaired | Pass | Commercial and Industrial    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 762 85
Purchased Impaired | Pass | Residential 1-4 Family - Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 6,512 5,234
Purchased Impaired | Pass | Residential 1-4 Family - Mortgage    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 9,894 2,764
Purchased Impaired | Pass | Auto    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 7  
Purchased Impaired | Pass | HELOC    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 3,438 446
Purchased Impaired | Pass | Consumer and all other    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 74 148
Purchased Impaired | Special Mention    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 21,699 13,881
Purchased Impaired | Special Mention | Construction and Land Development    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 1,308 1,260
Purchased Impaired | Special Mention | Commercial Real Estate - Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 6,685 7,486
Purchased Impaired | Special Mention | Commercial Real Estate - Non-Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 7,992 1,394
Purchased Impaired | Special Mention | Multifamily Real Estate    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 88 80
Purchased Impaired | Special Mention | Commercial and Industrial    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 134 123
Purchased Impaired | Special Mention | Residential 1-4 Family - Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 2,771 2,877
Purchased Impaired | Special Mention | Residential 1-4 Family - Mortgage    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 1,030 329
Purchased Impaired | Special Mention | Auto    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 0  
Purchased Impaired | Special Mention | HELOC    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 1,031 291
Purchased Impaired | Special Mention | Consumer and all other    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 660 41
Purchased Impaired | Substandard    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 32,864 5,435
Purchased Impaired | Substandard | Construction and Land Development    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 5,511 116
Purchased Impaired | Substandard | Commercial Real Estate - Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 10,612 2,346
Purchased Impaired | Substandard | Commercial Real Estate - Non-Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 4,554 1,296
Purchased Impaired | Substandard | Multifamily Real Estate    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 0 0
Purchased Impaired | Substandard | Commercial and Industrial    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 1,260 200
Purchased Impaired | Substandard | Residential 1-4 Family - Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 4,424 1,303
Purchased Impaired | Substandard | Residential 1-4 Family - Mortgage    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 5,842 71
Purchased Impaired | Substandard | Auto    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 0  
Purchased Impaired | Substandard | HELOC    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 646 94
Purchased Impaired | Substandard | Consumer and all other    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 15 9
Purchased Impaired | Doubtful    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 0 688
Purchased Impaired | Doubtful | Construction and Land Development    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 0 0
Purchased Impaired | Doubtful | Commercial Real Estate - Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 0 0
Purchased Impaired | Doubtful | Commercial Real Estate - Non-Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 0 0
Purchased Impaired | Doubtful | Multifamily Real Estate    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 0 0
Purchased Impaired | Doubtful | Commercial and Industrial    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 0 0
Purchased Impaired | Doubtful | Residential 1-4 Family - Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 0 0
Purchased Impaired | Doubtful | Residential 1-4 Family - Mortgage    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 0 569
Purchased Impaired | Doubtful | Auto    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 0  
Purchased Impaired | Doubtful | HELOC    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 0 119
Purchased Impaired | Doubtful | Consumer and all other    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans $ 0 $ 0