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LOANS AND ALLOWANCE FOR LOAN LOSSES (Loans Receivables Related Risk Rating Including Purchased Impaired Loans) (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |
Loans held for investment, net of deferred fees and costs | $ 12,220,514 | $ 9,716,207
Construction and Land Development |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans held for investment, net of deferred fees and costs | 1,267,712 | 1,194,821
Commercial Real Estate - Owner Occupied |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans held for investment, net of deferred fees and costs | 1,966,776 | 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 | 3,104,823 | 2,467,410
Multifamily Real Estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans held for investment, net of deferred fees and costs | 602,115 | 548,231
Commercial & Industrial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans held for investment, net of deferred fees and costs | 2,032,799 | 1,317,135
Residential 1-4 Family - Commercial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans held for investment, net of deferred fees and costs | 801,703 | 713,750
Residential 1-4 Family - Mortgage |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans held for investment, net of deferred fees and costs | 850,063 | 600,578
Auto |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans held for investment, net of deferred fees and costs | 311,858 | 301,943
HELOC |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans held for investment, net of deferred fees and costs | 660,621 | 613,383
Consumer |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans held for investment, net of deferred fees and costs | 383,653 | 379,694
Other Commercial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans held for investment, net of deferred fees and costs | 238,391 | 241,917
Purchased Impaired |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans held for investment, net of deferred fees and costs | 101,301 | 90,221
Purchased Impaired | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans held for investment, net of deferred fees and costs | 35,679 | 35,658
Purchased Impaired | Watch & Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans held for investment, net of deferred fees and costs | 28,806 | 21,699
Purchased Impaired | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans held for investment, net of deferred fees and costs | 36,748 | 32,864
Purchased Impaired | Doubtful |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans held for investment, net of deferred fees and costs | 68 | 0
Purchased Impaired | Construction and Land Development |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans held for investment, net of deferred fees and costs | 12,181 | 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 | 1,455 | 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 | 4,264 | 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 | 6,462 | 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 | 32,628 | 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 | 8,690 | 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 | 10,453 | 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 | 13,485 | 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 | 15,755 | 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 | 4,573 | 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 | 9,274 | 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 | 1,908 | 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 | 92 | 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 | 92 | 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 | 3,930 | 2,156
Purchased Impaired | Commercial & Industrial | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans held for investment, net of deferred fees and costs | 109 | 762
Purchased Impaired | Commercial & Industrial | Watch & Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans held for investment, net of deferred fees and costs | 94 | 134
Purchased Impaired | Commercial & Industrial | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans held for investment, net of deferred fees and costs | 3,727 | 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 | 12,675 | 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 | 6,238 | 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 | 2,998 | 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 | 3,371 | 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 | 68 | 0
Purchased Impaired | Residential 1-4 Family - Mortgage |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans held for investment, net of deferred fees and costs | 17,821 | 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 | 10,381 | 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 | 269 | 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 | 7,171 | 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 | 3 | 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 | 4 | 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 | 4,869 | 5,115
Purchased Impaired | HELOC | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans held for investment, net of deferred fees and costs | 3,502 | 3,438
Purchased Impaired | HELOC | Watch & Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans held for investment, net of deferred fees and costs | 760 | 1,031
Purchased Impaired | HELOC | Substandard |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans held for investment, net of deferred fees and costs | 607 | 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 | 689 | 32
Purchased Impaired | Consumer | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans held for investment, net of deferred fees and costs | 676 | 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 | 13 | 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 | 654 | 717
Purchased Impaired | Other Commercial | Pass |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans held for investment, net of deferred fees and costs | 52 | 57
Purchased Impaired | Other Commercial | Watch & Special Mention |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans held for investment, net of deferred fees and costs | 602 | 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

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- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5074-111524 + Details
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