REAL ESTATE AND RELATED LEASE INTANGIBLES, NET - Real Estate Properties Sold (Details) $ in Thousands		1 Months Ended										12 Months Ended
		Aug. 31, 2023 USD ($) property	Dec. 31, 2022 USD ($) property security	Sep. 30, 2022 USD ($) property	Jun. 30, 2022 USD ($) property	Mar. 31, 2022 USD ($) property	Dec. 31, 2021 USD ($) property	Nov. 30, 2021 USD ($) property	Aug. 31, 2021 USD ($) property	Jun. 30, 2021 USD ($) property	Feb. 28, 2021 USD ($) property	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($) property security	Dec. 31, 2021 USD ($) property
Disposal Groups, Including Discontinued Operations [Line Items]
Net Sales Proceeds												$ 13,391	$ 310,527	$ 190,870
Net Book Value	[1]		$ 700,136									726,442	700,136
Realized gain (loss) on sale of real estate, net												8,808	$ 115,998	55,766
Amount assumed by buyer included within sales proceeds												31,300
NEW YORK
Disposal Groups, Including Discontinued Operations [Line Items]
Remaining real estate units | security			1										1
2023 Disposal Properties
Disposal Groups, Including Discontinued Operations [Line Items]
Net Sales Proceeds												43,335
Net Book Value												34,526
Realized gain (loss) on sale of real estate, net												$ 8,808
2023 Disposal Properties | Hotel | San Diego, CA
Disposal Groups, Including Discontinued Operations [Line Items]
Net Sales Proceeds		$ 43,335
Net Book Value		34,526
Realized gain (loss) on sale of real estate, net		$ 8,808
Number of consolidated ventures sold | property		1
2022 Disposal Properties
Disposal Groups, Including Discontinued Operations [Line Items]
Net Sales Proceeds													$ 310,525
Net Book Value			$ 194,527										194,527
Realized gain (loss) on sale of real estate, net													115,998
Defeasance cost													$ 4,400
2022 Disposal Properties | Office | Ewing, NJ
Disposal Groups, Including Discontinued Operations [Line Items]
Net Sales Proceeds						$ 38,694
Net Book Value						24,175
Realized gain (loss) on sale of real estate, net						$ 14,519
Number of consolidated ventures sold | property						1
2022 Disposal Properties | Office | NEW YORK
Disposal Groups, Including Discontinued Operations [Line Items]
Number of consolidated ventures sold | security			1										1
2022 Disposal Properties | Warehouse | Conyers, GA
Disposal Groups, Including Discontinued Operations [Line Items]
Net Sales Proceeds						$ 40,752
Net Book Value						26,116
Realized gain (loss) on sale of real estate, net						$ 14,636
Number of consolidated ventures sold | property						1
2022 Disposal Properties | Apartments | Stillwater, OK
Disposal Groups, Including Discontinued Operations [Line Items]
Net Sales Proceeds					$ 23,314
Net Book Value					18,032
Realized gain (loss) on sale of real estate, net					$ 5,283
Number of consolidated ventures sold | property					1
2022 Disposal Properties | Apartments | Miami, Fl
Disposal Groups, Including Discontinued Operations [Line Items]
Net Sales Proceeds					$ 60,856
Net Book Value					37,585
Realized gain (loss) on sale of real estate, net					$ 23,270
Number of consolidated ventures sold | property					1
2022 Disposal Properties | Apartments | New York, NY
Disposal Groups, Including Discontinued Operations [Line Items]
Net Sales Proceeds			$ 7,935
Net Book Value			7,402										$ 7,402
Realized gain (loss) on sale of real estate, net			$ 533
Number of consolidated ventures sold | property			1										1
2022 Disposal Properties | Apartments | Sennett, NY
Disposal Groups, Including Discontinued Operations [Line Items]
Net Sales Proceeds			$ 10,599
Net Book Value			4,245										$ 4,245
Realized gain (loss) on sale of real estate, net			$ 6,354
Number of consolidated ventures sold | property			1										1
2022 Disposal Properties | Retail | Wichita, KS
Disposal Groups, Including Discontinued Operations [Line Items]
Net Sales Proceeds				$ 9,503
Net Book Value				5,110
Realized gain (loss) on sale of real estate, net				$ 4,393
Number of consolidated ventures sold | property				1
2022 Disposal Properties | Retail | Richmond, VA
Disposal Groups, Including Discontinued Operations [Line Items]
Net Sales Proceeds			$ 118,872
Net Book Value			71,862										$ 71,862
Realized gain (loss) on sale of real estate, net			$ 47,010
Number of consolidated ventures sold | property			1										1
2021 Disposal Properties
Disposal Groups, Including Discontinued Operations [Line Items]
Net Sales Proceeds														219,202
Net Book Value							$ 163,438							163,438
Realized gain (loss) on sale of real estate, net														55,766
2021 Disposal Properties | Hotel | Miami, Fl
Disposal Groups, Including Discontinued Operations [Line Items]
Net Sales Proceeds											$ 43,750
Net Book Value											43,750
Realized gain (loss) on sale of real estate, net											$ 0
Number of consolidated ventures sold | property											1
2021 Disposal Properties | Warehouse | North Dartmouth, MA
Disposal Groups, Including Discontinued Operations [Line Items]
Net Sales Proceeds										$ 38,732
Net Book Value										19,343
Realized gain (loss) on sale of real estate, net										$ 19,389
Number of consolidated ventures sold | property										1
2021 Disposal Properties | Apartments | Arlington/Fort Worth, TX
Disposal Groups, Including Discontinued Operations [Line Items]
Net Sales Proceeds									$ 26,496
Net Book Value									22,498
Realized gain (loss) on sale of real estate, net									$ 3,998
Number of consolidated ventures sold | property									2
2021 Disposal Properties | Net Lease | Pittsfield, MA
Disposal Groups, Including Discontinued Operations [Line Items]
Net Sales Proceeds									$ 18,651
Net Book Value									10,564
Realized gain (loss) on sale of real estate, net									$ 8,087
Number of consolidated ventures sold | property									1
2021 Disposal Properties | Net Lease | Ankeny, IA
Disposal Groups, Including Discontinued Operations [Line Items]
Net Sales Proceeds									$ 19,021
Net Book Value									13,341
Realized gain (loss) on sale of real estate, net									$ 5,680
Number of consolidated ventures sold | property									1
2021 Disposal Properties | Net Lease | Bessemer City, NC
Disposal Groups, Including Discontinued Operations [Line Items]
Net Sales Proceeds								$ 33,447
Net Book Value								21,333
Realized gain (loss) on sale of real estate, net								$ 12,114
Number of consolidated ventures sold | property								1
2021 Disposal Properties | Net Lease | Snellville, GA
Disposal Groups, Including Discontinued Operations [Line Items]
Net Sales Proceeds							9,695
Net Book Value							5,483							$ 5,483
Realized gain (loss) on sale of real estate, net							$ 4,212
Number of consolidated ventures sold | property							1							1
2021 Disposal Properties | Net Lease | Columbia, SC
Disposal Groups, Including Discontinued Operations [Line Items]
Net Sales Proceeds							$ 9,941
Net Book Value							5,674							$ 5,674
Realized gain (loss) on sale of real estate, net							$ 4,269
Number of consolidated ventures sold | property							1							1
2021 Disposal Properties | Land | Los Angeles, CA
Disposal Groups, Including Discontinued Operations [Line Items]
Net Sales Proceeds							$ 19,469
Net Book Value							21,452							$ 21,452
Realized gain (loss) on sale of real estate, net							$ (1,983)
Number of consolidated ventures sold | property							1							1

[1] Includes amounts relating to consolidated variable interest entities. Refer to Note 2 and Note 9.