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BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Loans Receivable (Details) - USD ($) | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019 | Dec. 31, 2015 | Mar. 11, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Unamortized retained loan discounts | $ 7,540,000 |  | $ 7,540,000 |  | $ 7,622,000 |  |
Loan receivable, nonaccrual, past due period (more than) |  |  | 60 days |  |  |  |
Loans receivable, impairment (recovery) | 1,000 | $ 140,000 | $ (15,000) | $ 84,000 |  |  |
Impaired loans receivable | 0 | $ 0 | 0 | $ 0 |  |  |
SBA 7(a) loans receivable, subject to secured borrowings |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Unamortized acquisition discounts related to sold loans |  |  |  |  |  | $ 15,951,000 |
PMC Commercial |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Discount on acquisition |  |  |  |  |  |  | $ 33,907,000
Acquisition discount | $ 533,000 |  | $ 533,000 |  | $ 624,000 |  |

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- Definition Represents the information pertaining to discount adjustment between carrying value of our loans and estimated fair market value. + References No definition available. + Details
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- Definition Amount of unamortized discount of loans acquired in connection with business combinations in a disposal group. + References No definition available. + Details
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- Definition Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953550-111524 + Details
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- Definition Amount of credit loss expense (reversal of expense) for financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(11)) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
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- Definition Amount of deferred fees paid by borrowers and unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of loans that are being amortized into income as an adjustment to yield. 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 310 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6378536&loc=d3e10092-111533 + Details
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