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LOANS AND ALLOWANCE FOR LOAN LOSSES (Summary of Aging of the Loan Portfolio by Class) (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Jan. 01, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Current | $ 12,649,743 |  | $ 12,419,378
Greater Than 90 Days and Still Accruing | 12,876 |  | 13,396
Nonaccrual | 44,022 | $ 45,204 | 28,232
Total Loans | 12,768,841 |  | 12,610,936
30-59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due | 48,868 |  | 50,453
60-89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due | 13,332 |  | 12,796
Purchased Impaired |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Current |  |  | 70,267
Total Loans | 84,700 |  | 86,681
Purchased Impaired | 30-89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due |  |  | 3,221
Purchased Impaired | 90+ Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due |  |  | 13,193
Construction and Land Development |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Current | 1,311,599 |  | 1,231,043
Greater Than 90 Days and Still Accruing | 317 |  | 189
Nonaccrual | 3,234 | 4,060 | 3,703
Total Loans | 1,318,252 |  | 1,250,924
Construction and Land Development | 30-59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due | 2,786 |  | 4,563
Construction and Land Development | 60-89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due | 316 |  | 482
Construction and Land Development | Purchased Impaired |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Current |  |  | 10,465
Total Loans |  |  | 10,944
Construction and Land Development | Purchased Impaired | 30-89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due |  |  | 136
Construction and Land Development | Purchased Impaired | 90+ Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due |  |  | 343
Commercial Real Estate - Owner Occupied |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Current | 2,026,741 |  | 2,001,074
Greater Than 90 Days and Still Accruing | 1,690 |  | 1,062
Nonaccrual | 11,250 | 13,889 | 6,003
Total Loans | 2,051,904 |  | 2,041,243
Commercial Real Estate - Owner Occupied | 30-59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due | 10,779 |  | 3,482
Commercial Real Estate - Owner Occupied | 60-89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due | 1,444 |  | 2,184
Commercial Real Estate - Owner Occupied | Purchased Impaired |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Current |  |  | 20,074
Total Loans |  |  | 27,438
Commercial Real Estate - Owner Occupied | Purchased Impaired | 30-89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due |  |  | 480
Commercial Real Estate - Owner Occupied | Purchased Impaired | 90+ Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due |  |  | 6,884
Commercial Real Estate - Non-Owner Occupied |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Current | 3,319,481 |  | 3,269,244
Greater Than 90 Days and Still Accruing | 2,037 |  | 1,451
Nonaccrual | 1,642 | 1,368 | 381
Total Loans | 3,328,012 |  | 3,286,098
Commercial Real Estate - Non-Owner Occupied | 30-59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due | 2,087 |  | 457
Commercial Real Estate - Non-Owner Occupied | 60-89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due | 2,765 |  | 0
Commercial Real Estate - Non-Owner Occupied | Purchased Impaired |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Current |  |  | 12,730
Total Loans |  |  | 14,565
Commercial Real Estate - Non-Owner Occupied | Purchased Impaired | 30-89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due |  |  | 848
Commercial Real Estate - Non-Owner Occupied | Purchased Impaired | 90+ Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due |  |  | 987
Multifamily Real Estate |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Current | 676,343 |  | 632,952
Greater Than 90 Days and Still Accruing | 377 |  | 474
Nonaccrual | 53 | 0 | 0
Total Loans | 679,390 |  | 633,743
Multifamily Real Estate | 30-59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due | 623 |  | 223
Multifamily Real Estate | 60-89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due | 1,994 |  | 0
Multifamily Real Estate | Purchased Impaired |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Current |  |  | 94
Total Loans |  |  | 94
Multifamily Real Estate | Purchased Impaired | 30-89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due |  |  | 0
Multifamily Real Estate | Purchased Impaired | 90+ Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due |  |  | 0
Commercial and Industrial |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Current | 2,167,873 |  | 2,099,974
Greater Than 90 Days and Still Accruing | 517 |  | 449
Nonaccrual | 3,431 | 3,037 | 1,735
Total Loans | 2,177,932 |  | 2,114,033
Commercial and Industrial | 30-59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due | 4,893 |  | 8,698
Commercial and Industrial | 60-89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due | 1,218 |  | 1,598
Commercial and Industrial | Purchased Impaired |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Current |  |  | 590
Total Loans |  |  | 1,579
Commercial and Industrial | Purchased Impaired | 90+ Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due |  |  | 989
Residential 1-4 Family - Commercial |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Current | 708,772 |  | 703,471
Greater Than 90 Days and Still Accruing | 777 |  | 674
Nonaccrual | 7,040 | 6,492 | 4,301
Total Loans | 721,800 |  | 724,337
Residential 1-4 Family - Commercial | 30-59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due | 4,145 |  | 1,479
Residential 1-4 Family - Commercial | 60-89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due | 1,066 |  | 2,207
Residential 1-4 Family - Commercial | Purchased Impaired |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Current |  |  | 9,667
Total Loans |  |  | 12,205
Residential 1-4 Family - Commercial | Purchased Impaired | 30-89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due |  |  | 543
Residential 1-4 Family - Commercial | Purchased Impaired | 90+ Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due |  |  | 1,995
Residential 1-4 Family - Consumer |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Current | 820,818 |  | 842,667
Greater Than 90 Days and Still Accruing | 4,407 |  | 4,515
Nonaccrual | 13,088 | 13,117 | 9,292
Total Loans | 854,550 |  | 890,503
Residential 1-4 Family - Consumer | 30-59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due | 15,667 |  | 16,244
Total Loans | 15,667 |  |
Residential 1-4 Family - Consumer | 60-89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due | 570 |  | 3,072
Total Loans | 570 |  |
Residential 1-4 Family - Consumer | 90+ Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Loans | 4,407 |  |
Residential 1-4 Family - Consumer | Purchased Impaired |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Current |  |  | 12,005
Total Loans |  |  | 14,713
Residential 1-4 Family - Consumer | Purchased Impaired | 30-89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due |  |  | 927
Residential 1-4 Family - Consumer | Purchased Impaired | 90+ Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due |  |  | 1,781
Residential 1-4 Family - Revolving |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Current | 640,989 |  | 637,966
Greater Than 90 Days and Still Accruing | 2,005 |  | 3,357
Nonaccrual | 3,547 | 2,490 | 2,080
Total Loans | 652,135 |  | 659,504
Residential 1-4 Family - Revolving | 30-59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due | 4,308 |  | 10,190
Total Loans | 4,308 |  |
Residential 1-4 Family - Revolving | 60-89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due | 1,286 |  | 1,784
Total Loans | 1,286 |  |
Residential 1-4 Family - Revolving | 90+ Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Loans | 2,005 |  |
Residential 1-4 Family - Revolving | Purchased Impaired |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Current |  |  | 3,635
Total Loans |  |  | 4,127
Residential 1-4 Family - Revolving | Purchased Impaired | 30-89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due |  |  | 287
Residential 1-4 Family - Revolving | Purchased Impaired | 90+ Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due |  |  | 205
Auto |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Current | 355,084 |  | 346,819
Greater Than 90 Days and Still Accruing | 127 |  | 272
Nonaccrual | 550 | 565 | 563
Total Loans | 358,039 |  | 350,419
Auto | 30-59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due | 1,967 |  | 2,525
Total Loans | 1,967 |  |
Auto | 60-89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due | 311 |  | 236
Total Loans | 311 |  |
Auto | 90+ Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Loans | 127 |  |
Auto | Purchased Impaired |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Current |  |  | 4
Total Loans |  |  | 4
Consumer |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Current | 348,953 |  | 367,794
Greater Than 90 Days and Still Accruing | 622 |  | 953
Nonaccrual | 91 | 88 | 77
Total Loans | 352,572 |  | 372,853
Consumer | 30-59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due | 1,612 |  | 2,128
Total Loans | 1,612 |  |
Consumer | 60-89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due | 1,294 |  | 1,233
Total Loans | 1,294 |  |
Consumer | 90+ Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Loans | 622 |  |
Consumer | Purchased Impaired |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Current |  |  | 659
Total Loans |  |  | 668
Consumer | Purchased Impaired | 90+ Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due |  |  | 9
Other Commercial |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Current | 273,090 |  | 286,374
Greater Than 90 Days and Still Accruing | 0 |  | 0
Nonaccrual | 96 | $ 98 | 97
Total Loans | 274,255 |  | 287,279
Other Commercial | 30-59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due | 1 |  | 464
Other Commercial | 60-89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due | $ 1,068 |  | 0
Other Commercial | Purchased Impaired |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Current |  |  | 344
Total Loans |  |  | 344
Other Commercial | Purchased Impaired | 30-89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due |  |  | 0
Other Commercial | Purchased Impaired | 90+ Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Past Due |  |  | $ 0

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