Schedule II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allowance for Tenant Receivables
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance, beginning of year	$ 2,337,000	$ 2,011,000	$ 1,910,000
Additions in allowance charged to expense	0	4,817,000	3,782,000
Bad debts charged against allowance	(2,337,000)	(4,491,000)	(3,681,000)
Balance, end of year	0	2,337,000	2,011,000
Allowance for Other Receivables
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance, beginning of year	0	838,000	838,000
Additions in allowance charged to expense	0	0	0
Bad debts charged against allowance	0	(838,000)	0
Balance, end of year	$ 0	$ 0	$ 838,000

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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- Definition

Amount of valuation and qualifying accounts and reserves.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-09)
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

+ Details

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- Definition

Amount of increase in valuation and qualifying accounts and reserves from charge to cost and expense.

+ References

+ Details

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- Definition

Amount of decrease in valuation and qualifying accounts and reserves.

+ References

+ Details

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