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LOANS AND ALLOWANCE FOR LOAN LOSSES (PCI Loan Portfolios by Segment and Delinquency Status) (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | $ 12,419,378 | $ 9,537,156
Total Loans | 12,610,936 | 9,716,207
Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 70,267 | 71,213
Total Loans | 86,681 | 90,221
Construction and Land Development |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 1,231,043 | 1,177,204
Total Loans | 1,250,924 | 1,194,821
Construction and Land Development | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 10,465 | 7,122
Total Loans | 10,944 | 8,654
Commercial Real Estate - Owner Occupied |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 2,001,074 | 1,294,975
Total Loans | 2,041,243 | 1,337,345
Commercial Real Estate - Owner Occupied | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 20,074 | 20,705
Total Loans | 27,438 | 25,644
Commercial Real Estate - Non-Owner Occupied |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 3,269,244 | 2,447,907
Total Loans | 3,286,098 | 2,467,410
Commercial Real Estate - Non-Owner Occupied | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 12,730 | 15,464
Total Loans | 14,565 | 17,335
Multifamily Real Estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 632,952 | 547,997
Total Loans | 633,743 | 548,231
Multifamily Real Estate | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 94 | 88
Total Loans | 94 | 88
Commercial and Industrial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 2,099,974 | 1,309,581
Total Loans | 2,114,033 | 1,317,135
Commercial and Industrial | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 590 | 1,017
Total Loans | 1,579 | 2,156
Residential 1-4 Family - Commercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 703,471 | 614,732
Total Loans | 724,337 | 640,419
Residential 1-4 Family - Commercial | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 9,667 | 9,276
Total Loans | 12,205 | 13,601
Residential 1-4 Family - Consumer |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 842,667 | 630,132
Total Loans | 890,503 | 673,909
Residential 1-4 Family - Consumer | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 12,005 | 12,491
Total Loans | 14,713 | 16,872
Residential 1-4 Family - Revolving |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 637,966 | 600,055
Total Loans | 659,504 | 613,383
Residential 1-4 Family - Revolving | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 3,635 | 4,365
Total Loans | 4,127 | 5,115
Auto |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 346,819 | 297,442
Total Loans | 350,419 | 301,943
Auto | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 4 | 7
Total Loans | 4 | 7
Consumer |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 367,794 | 376,057
Total Loans | 372,853 | 379,694
Consumer | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 659 | 18
Total Loans | 668 | 32
Other Commercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 286,374 | 241,074
Total Loans | 287,279 | 241,917
Other Commercial | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 344 | 660
Total Loans | 344 | 717
30 To 89 Days Past Due | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 3,221 | 4,264
30 To 89 Days Past Due | Construction and Land Development | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 136 | 108
30 To 89 Days Past Due | Commercial Real Estate - Owner Occupied | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 480 | 658
30 To 89 Days Past Due | Commercial Real Estate - Non-Owner Occupied | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 848 | 61
30 To 89 Days Past Due | Multifamily Real Estate | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 0 | 0
30 To 89 Days Past Due | Commercial and Industrial | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 0 | 47
30 To 89 Days Past Due | Residential 1-4 Family - Commercial | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 543 | 871
30 To 89 Days Past Due | Residential 1-4 Family - Consumer | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 927 | 1,959
30 To 89 Days Past Due | Residential 1-4 Family - Revolving | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 287 | 498
30 To 89 Days Past Due | Auto | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 0 | 0
30 To 89 Days Past Due | Consumer | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 0 | 5
30 To 89 Days Past Due | Other Commercial | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 0 | 57
Greater Than 90 Days | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 13,193 | 14,744
Greater Than 90 Days | Construction and Land Development | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 343 | 1,424
Greater Than 90 Days | Commercial Real Estate - Owner Occupied | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 6,884 | 4,281
Greater Than 90 Days | Commercial Real Estate - Non-Owner Occupied | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 987 | 1,810
Greater Than 90 Days | Multifamily Real Estate | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 0 | 0
Greater Than 90 Days | Commercial and Industrial | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 989 | 1,092
Greater Than 90 Days | Residential 1-4 Family - Commercial | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 1,995 | 3,454
Greater Than 90 Days | Residential 1-4 Family - Consumer | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 1,781 | 2,422
Greater Than 90 Days | Residential 1-4 Family - Revolving | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 205 | 252
Greater Than 90 Days | Auto | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 0 | 0
Greater Than 90 Days | Consumer | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 9 | 9
Greater Than 90 Days | Other Commercial | Purchased Impaired |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | $ 0 | $ 0

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