SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Amortized Cost Basis of Financing Receivables by Receivable Type) (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables	$ 374,178
MUD Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables	314,394
SID Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables	54,770
TIF Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables	893
Net Investments in Lease Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables	2,943
Notes Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables	$ 1,178