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, 2019
Dec. 31, 2018
Financing Receivable, Recorded Investment [Line Items]    
Total Loans $ 12,610,936 $ 9,716,207
Construction and Land Development    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 1,250,924 1,194,821
Commercial Real Estate - Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 2,041,243 1,337,345
Commercial Real Estate - Non-Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 3,286,098 2,467,410
Multifamily Real Estate    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 633,743 548,231
Commercial and Industrial    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 2,114,033 1,317,135
Residential 1-4 Family - Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 724,337 640,419
Residential 1-4 Family - Consumer    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 890,503 673,909
Residential 1-4 Family - Revolving    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 659,504 613,383
Auto    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 350,419 301,943
Consumer and all other    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 660,132 621,611
Consumer    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 372,853 379,694
Other Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 287,279 241,917
Purchased Impaired    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 86,681 90,221
Purchased Impaired | Construction and Land Development    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 10,944 8,654
Purchased Impaired | Commercial Real Estate - Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 27,438 25,644
Purchased Impaired | Commercial Real Estate - Non-Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 14,565 17,335
Purchased Impaired | Multifamily Real Estate    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 94 88
Purchased Impaired | Commercial and Industrial    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 1,579 2,156
Purchased Impaired | Residential 1-4 Family - Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 12,205 13,601
Purchased Impaired | Residential 1-4 Family - Consumer    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 14,713 16,872
Purchased Impaired | Residential 1-4 Family - Revolving    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 4,127 5,115
Purchased Impaired | Auto    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 4 7
Purchased Impaired | Consumer and all other    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 1,012 749
Purchased Impaired | Consumer    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 668 32
Purchased Impaired | Other Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 344 717
Purchased Impaired | Pass    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 32,922 35,658
Purchased Impaired | Pass | Construction and Land Development    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 1,092 1,835
Purchased Impaired | Pass | Commercial Real Estate - Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 8,264 8,347
Purchased Impaired | Pass | Commercial Real Estate - Non-Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 3,826 4,789
Purchased Impaired | Pass | Multifamily Real Estate    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 0  
Purchased Impaired | Pass | Commercial and Industrial    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 127 762
Purchased Impaired | Pass | Residential 1-4 Family - Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 6,000 6,476
Purchased Impaired | Pass | Residential 1-4 Family - Consumer    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 9,947 9,930
Purchased Impaired | Pass | Residential 1-4 Family - Revolving    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 2,887 3,438
Purchased Impaired | Pass | Auto    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 2 7
Purchased Impaired | Pass | Consumer    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 657 17
Purchased Impaired | Pass | Other Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 120 57
Purchased Impaired | Special Mention    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 27,931 21,699
Purchased Impaired | Special Mention | Construction and Land Development    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 3,692 1,308
Purchased Impaired | Special Mention | Commercial Real Estate - Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 10,524 6,685
Purchased Impaired | Special Mention | Commercial Real Estate - Non-Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 9,415 7,992
Purchased Impaired | Special Mention | Multifamily Real Estate    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 94 88
Purchased Impaired | Special Mention | Commercial and Industrial    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 25 134
Purchased Impaired | Special Mention | Residential 1-4 Family - Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 2,693 2,771
Purchased Impaired | Special Mention | Residential 1-4 Family - Consumer    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 557 1,030
Purchased Impaired | Special Mention | Residential 1-4 Family - Revolving    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 707 1,031
Purchased Impaired | Special Mention | Auto    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 0  
Purchased Impaired | Special Mention | Consumer    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 0  
Purchased Impaired | Special Mention | Other Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 224 660
Purchased Impaired | Substandard    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 25,828 32,864
Purchased Impaired | Substandard | Construction and Land Development    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 6,160 5,511
Purchased Impaired | Substandard | Commercial Real Estate - Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 8,650 10,612
Purchased Impaired | Substandard | Commercial Real Estate - Non-Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 1,324 4,554
Purchased Impaired | Substandard | Multifamily Real Estate    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 0  
Purchased Impaired | Substandard | Commercial and Industrial    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 1,427 1,260
Purchased Impaired | Substandard | Residential 1-4 Family - Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 3,512 4,354
Purchased Impaired | Substandard | Residential 1-4 Family - Consumer    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 4,209 5,912
Purchased Impaired | Substandard | Residential 1-4 Family - Revolving    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 533 646
Purchased Impaired | Substandard | Auto    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 2  
Purchased Impaired | Substandard | Consumer    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 11 15
Purchased Impaired | Substandard | Other Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 0  
Purchased Impaired | Doubtful    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 0 0
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 - Consumer    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 0 0
Purchased Impaired | Doubtful | Residential 1-4 Family - Revolving    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 0 0
Purchased Impaired | Doubtful | Auto    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 0 0
Purchased Impaired | Doubtful | Consumer    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans 0 0
Purchased Impaired | Doubtful | Other Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Total Loans $ 0 $ 0