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NOTES RECEIVABLE FROM MOBILE HOME PARKS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Notes Receivable from Mobile Home Parks
Notes Receivable
Note receivable with fixed rate of interest	$ 82,000		$ 82,000
Average interest rate per loan (as a percent)			7.70%		7.70%
Charge offs	0	$ 0	$ 0	$ 0
Allowance for loan losses	$ 0		$ 0		$ 0
Notes Receivable from Mobile Home Parks | Credit concentration risk | Independent third party and affiliates
Notes Receivable
Concentration risk percentage			29.80%		52.90%
Minimum | Notes Receivable from Mobile Home Parks
Notes Receivable
Fixed rate of interest (as a percent)			6.90%
Variable rate of interest (as a percent)			8.00%
Term of notes receivables			1 year
Minimum | Prime Rate | Notes Receivable from Mobile Home Parks
Notes Receivable
Interest rate spread (as a percent)	4.00%		4.00%
Maximum | Notes Receivable from Mobile Home Parks
Notes Receivable
Fixed rate of interest (as a percent)			8.90%
Term of notes receivables			20 years

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Average interest rate per loan for loans receivable.

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Variable interest rate of notes receivable.

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Term of notes receivables.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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The percentage points (also referred to as 'margin') added to the reference rate as stated in the loan agreement and used to compute the variable rate on the loans receivable. For instance, the loan agreement might state that the interest rate the borrower is obligated to pay is the London Interbank Offered Rate (LIBOR) plus three quarters (3/4) of a percentage point adjusted quarterly (each three months). LIBOR in this example is the index or reference rate, 3/4 percentage point is the margin, the reference rate plus the margin is the fully indexed rate. This element would be used to report separately the margin.

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