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LOANS AND ALLOWANCE FOR LOAN LOSSES (Loans Stated at Face Amount, Net of Unearned Income) (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
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Loans and Leases Receivable Disclosure [Line Items] |  |
Total loans held for investment, net of deferred fees and costs | $ 13,139,586 | $ 14,021,314
Total Allowance for credit losses | (101,798) | (160,540)
Total loans held for investment, net | 13,037,788 | 13,860,774
Loans receivable, deferred fees and costs | 60,000 | 69,700
Construction and Land Development |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Total loans held for investment, net of deferred fees and costs | 877,351 | 925,798
Commercial Real Estate - Owner Occupied |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Total loans held for investment, net of deferred fees and costs | 2,027,299 | 2,128,909
Commercial Real Estate - Non-Owner Occupied |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Total loans held for investment, net of deferred fees and costs | 3,730,720 | 3,657,562
Multifamily Real Estate |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Total loans held for investment, net of deferred fees and costs | 776,287 | 814,745
Commercial and Industrial |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Total loans held for investment, net of deferred fees and costs | 2,580,190 | 3,263,460
Residential 1-4 Family - Commercial |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Total loans held for investment, net of deferred fees and costs | 624,347 | 671,949
Residential 1-4 Family - Mortgage |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Total loans held for investment, net of deferred fees and costs | 822,971 | 822,866
Residential 1-4 Family - Revolving |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Total loans held for investment, net of deferred fees and costs | 557,803 | 596,996
Auto |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Total loans held for investment, net of deferred fees and costs | 425,436 | 401,324
Consumer |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Total loans held for investment, net of deferred fees and costs | 182,039 | 247,730
Other Commercial |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Total loans held for investment, net of deferred fees and costs | 535,143 | 489,975
Paycheck Protection Program (PPP) | Commercial and Industrial |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Total loans held for investment, net | 455,800 | 1,200,000
Paycheck Protection Program (PPP) | Other Commercial |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Total loans held for investment, net | $ 10,800 | $ 11,300

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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=122038336&loc=d3e74567-122707 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 + Details
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- Definition Amount of deferred interest and fee income, unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of acquired loans. Excludes amounts for 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 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=123392090&loc=d3e45377-112738 Reference 3: 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=123577603&loc=d3e5074-111524 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84159169&loc=d3e10152-111534 + Details
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