COMPONENTS OF RENTAL INCOME AND EXPENSE - Component of Rental Income (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Rental Income [Line Items]
Percentage rent	$ 23	$ 289	$ 324	$ 555
Hotel revenue	1,143	9,466	9,268	19,108
Other	524	455	1,101	908
Total rental income	79,230	79,656	171,300	156,487
Recognition of straight-line rents	8,500	(4,500)	11,300	(4,300)
Recognition of amortization of above and below market leases	1,000	800	1,900	1,700
Office
Rental Income [Line Items]
Lease rental income	42,484	28,564	84,697	54,712
Retail
Rental Income [Line Items]
Lease rental income	20,909	25,021	45,864	49,470
Multifamily
Rental Income [Line Items]
Lease rental income	11,643	11,975	23,610	23,971
Mixed-use
Rental Income [Line Items]
Lease rental income	$ 2,504	$ 3,886	$ 6,436	$ 7,763

Lease rental income

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- Definition

Other real estate rental revenue.

+ References

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- Definition

Rental Income [Line Items]

+ References

No definition available.

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- Definition

Amount of non-cash amortization of intangible asset (liability) for above and below market leases.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
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- Definition

Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 50
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- Definition

Amount of operating lease income from variable lease payments paid and payable to lessor, excluding amount included in measurement of lease receivable.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

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-Publisher FASB
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- Definition

Difference between actual rental income due and rental income recognized on a straight-line basis.

+ References

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-Publisher FASB
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