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LOANS HELD FOR INVESTMENT, NET - Collateral Dependent Loans (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
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Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Individually evaluated for impairment |  | $ 17,069
Individually evaluated for impairment |  | 6,474
Commercial and industrial ("C&I") |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Individually evaluated for impairment |  | 12,502
Individually evaluated for impairment |  | $ 6,474
Collateral Dependent Loans | Commercial and industrial ("C&I") |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Individually evaluated for impairment | $ 8,000 |
Individually evaluated for impairment | 4,100 |
Collateral Dependent Loans | Commercial real estate ("CRE") |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Individually evaluated for impairment | 66,000 |
Individually evaluated for impairment | 17,400 |
Collateral Dependent Loans | Multifamily residential and residential mixed-use |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Individually evaluated for impairment | 12,500 |
Individually evaluated for impairment | $ 2,600 |

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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: 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=121611835&loc=SL6953423-111524 + Details
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- Definition The balance of financing receivables that were individually evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 + Details
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