Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.1
LOANS AND ALLOWANCE FOR LOAN LOSSES (Loans Receivables Related Risk Rating Including Purchased Impaired Loans) (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs $ 11,952,310 $ 9,716,207
Construction and Land Development    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 1,326,679 1,194,821
Commercial Real Estate - Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 1,921,464 1,337,345
Commercial Real Estate - Non-Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 2,970,453 2,467,410
Multifamily Real Estate    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 591,431 548,231
Commercial & Industrial    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 1,866,625 1,317,135
Residential 1-4 Family - Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 815,309 713,750
Residential 1-4 Family - Mortgage    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 865,502 600,578
Auto    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 300,631 301,943
HELOC    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 672,087 613,383
Consumer    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 397,491 379,694
Other Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 224,638 241,917
Purchased Impaired    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 99,932 90,221
Purchased Impaired | Pass    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 36,166 35,658
Purchased Impaired | Watch & Special Mention    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 26,110 21,699
Purchased Impaired | Substandard    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 37,586 32,864
Purchased Impaired | Doubtful    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 70 0
Purchased Impaired | Construction and Land Development    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 12,600 8,654
Purchased Impaired | Construction and Land Development | Pass    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 1,760 1,835
Purchased Impaired | Construction and Land Development | Watch & Special Mention    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 4,430 1,308
Purchased Impaired | Construction and Land Development | Substandard    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 6,410 5,511
Purchased Impaired | Construction and Land Development | Doubtful    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 0 0
Purchased Impaired | Commercial Real Estate - Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 26,836 25,644
Purchased Impaired | Commercial Real Estate - Owner Occupied | Pass    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 8,194 8,347
Purchased Impaired | Commercial Real Estate - Owner Occupied | Watch & Special Mention    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 6,741 6,685
Purchased Impaired | Commercial Real Estate - Owner Occupied | Substandard    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 11,901 10,612
Purchased Impaired | Commercial Real Estate - Owner Occupied | Doubtful    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 0 0
Purchased Impaired | Commercial Real Estate - Non-Owner Occupied    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 18,850 17,335
Purchased Impaired | Commercial Real Estate - Non-Owner Occupied | Pass    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 4,596 4,789
Purchased Impaired | Commercial Real Estate - Non-Owner Occupied | Watch & Special Mention    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 7,323 7,992
Purchased Impaired | Commercial Real Estate - Non-Owner Occupied | Substandard    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 6,931 4,554
Purchased Impaired | Commercial Real Estate - Non-Owner Occupied | Doubtful    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 0 0
Purchased Impaired | Multifamily Real Estate    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 90 88
Purchased Impaired | Multifamily Real Estate | Pass    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 0 0
Purchased Impaired | Multifamily Real Estate | Watch & Special Mention    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 90 88
Purchased Impaired | Multifamily Real Estate | Substandard    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 0 0
Purchased Impaired | Multifamily Real Estate | Doubtful    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 0 0
Purchased Impaired | Commercial & Industrial    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 4,159 2,156
Purchased Impaired | Commercial & Industrial | Pass    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 107 762
Purchased Impaired | Commercial & Industrial | Watch & Special Mention    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 1,182 134
Purchased Impaired | Commercial & Industrial | Substandard    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 2,870 1,260
Purchased Impaired | Commercial & Industrial | Doubtful    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 0 0
Purchased Impaired | Residential 1-4 Family - Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 13,693 13,707
Purchased Impaired | Residential 1-4 Family - Commercial | Pass    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 6,673 6,512
Purchased Impaired | Residential 1-4 Family - Commercial | Watch & Special Mention    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 2,907 2,771
Purchased Impaired | Residential 1-4 Family - Commercial | Substandard    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 4,043 4,424
Purchased Impaired | Residential 1-4 Family - Commercial | Doubtful    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 70 0
Purchased Impaired | Residential 1-4 Family - Mortgage    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 17,180 16,766
Purchased Impaired | Residential 1-4 Family - Mortgage | Pass    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 10,701 9,894
Purchased Impaired | Residential 1-4 Family - Mortgage | Watch & Special Mention    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 1,614 1,030
Purchased Impaired | Residential 1-4 Family - Mortgage | Substandard    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 4,865 5,842
Purchased Impaired | Residential 1-4 Family - Mortgage | Doubtful    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 0 0
Purchased Impaired | Auto    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 7 7
Purchased Impaired | Auto | Pass    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 4 7
Purchased Impaired | Auto | Watch & Special Mention    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 0 0
Purchased Impaired | Auto | Substandard    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 3 0
Purchased Impaired | Auto | Doubtful    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 0 0
Purchased Impaired | HELOC    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 5,138 5,115
Purchased Impaired | HELOC | Pass    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 3,395 3,438
Purchased Impaired | HELOC | Watch & Special Mention    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 1,192 1,031
Purchased Impaired | HELOC | Substandard    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 551 646
Purchased Impaired | HELOC | Doubtful    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 0 0
Purchased Impaired | Consumer    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 693 32
Purchased Impaired | Consumer | Pass    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 681 17
Purchased Impaired | Consumer | Watch & Special Mention    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 0 0
Purchased Impaired | Consumer | Substandard    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 12 15
Purchased Impaired | Consumer | Doubtful    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 0 0
Purchased Impaired | Other Commercial    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 686 717
Purchased Impaired | Other Commercial | Pass    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 55 57
Purchased Impaired | Other Commercial | Watch & Special Mention    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 631 660
Purchased Impaired | Other Commercial | Substandard    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs 0 0
Purchased Impaired | Other Commercial | Doubtful    
Financing Receivable, Recorded Investment [Line Items]    
Loans held for investment, net of deferred fees and costs $ 0 $ 0