DEBT - Schedule of Debt (Details) - USD ($)	9 Months Ended
Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Total Debt	$ 326,546,000	$ 307,421,000
Mortgages Payable
Debt Instrument [Line Items]
Deferred loan costs	(154,000)	(174,000)
Total Debt	96,946,000	96,926,000
Mortgage loan with a fixed interest of 4.14% per annum, due on July 1, 2026
Debt Instrument [Line Items]
Gross debt	$ 97,100,000	97,100,000
Fixed interest rate	4.14%
Amount of balance due on maturity	$ 97,100,000
Secured Borrowings - Government Guaranteed Loans
Debt Instrument [Line Items]
Gross debt	8,552,000	12,152,000
Premiums and discounts	466,000	629,000
Total Debt	9,018,000	12,781,000
Secured borrowing principal on SBA 7(a) loans sold for a premium and excess spread
Debt Instrument [Line Items]
Gross debt	$ 5,772,000	$ 7,845,000
Weighted average rate	3.87%	5.68%
Secured borrowing principal on SBA 7(a) loans sold for excess spread
Debt Instrument [Line Items]
Gross debt	$ 2,780,000	$ 4,307,000
Weighted average rate	1.56%	3.32%
Other Debt
Debt Instrument [Line Items]
Gross debt	$ 224,709,000	$ 202,352,000
Total Debt	220,582,000	197,714,000
Junior Subordinated Debt
Debt Instrument [Line Items]
Gross debt	27,070,000	27,070,000
Premiums and discounts	$ (1,705,000)	(1,771,000)
Junior Subordinated Debt \| LIBOR
Debt Instrument [Line Items]
Interest rate margin	3.25%
Loan-Backed Notes
Debt Instrument [Line Items]
Gross debt	$ 15,123,000	22,282,000
Loan-Backed Notes \| LIBOR
Debt Instrument [Line Items]
Interest rate margin	1.40%
Loan-Backed Notes \| Prime Rate
Debt Instrument [Line Items]
Interest rate margin	(1.08%)
Unsecured Loans And Credit Facilities
Debt Instrument [Line Items]
Deferred loan costs	$ (2,422,000)	(2,867,000)
2018 Revolving Credit Facility \| Line of Credit
Debt Instrument [Line Items]
Gross debt	166,500,000	153,000,000
2018 Revolving Credit Facility \| Line of Credit \| Paycheck Protection Program Liquidity Facility, CARES Act
Debt Instrument [Line Items]
Gross debt	16,016,000	0
2018 Revolving Credit Facility \| Unsecured Debt
Debt Instrument [Line Items]
Gross debt	$ 0	$ 0

Amount of short-term and long-term debt and lease obligation.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount of payment greater than the preceding installment payments to be paid at final maturity date of debt.

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Amount, after accumulated amortization, of debt discount (premium).

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Weighted average interest rate of debt outstanding.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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