Acquisitions and Dispositions - Dispositions Narrative (Details) $ in Thousands												3 Months Ended		9 Months Ended		12 Months Ended
	Dec. 22, 2021 USD ($) a building	Sep. 16, 2021 USD ($) room	May 07, 2021 USD ($) a	Dec. 18, 2020 USD ($)	Nov. 20, 2020 USD ($) a	Jul. 16, 2020 USD ($) room	Jun. 29, 2020 USD ($)	Mar. 13, 2020 USD ($) a ft² space	Dec. 20, 2019 USD ($)	Oct. 29, 2019 USD ($) a	Sep. 16, 2019 USD ($) ft² a	Jun. 30, 2021 building	Mar. 31, 2020 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($) room	Dec. 31, 2019 USD ($)	Nov. 30, 2019 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Carrying value of the asset																$ 7,033,244	$ 6,685,069
Operating Losses																(241,872)	119,561	$ (150,310)
Equity in earnings (losses) from real estate and other affiliates																(9,852)	271,099	30,629
Proceeds from sales of properties																322,451	24,373	67,110
Gain (loss) on sale or disposal of real estate and other assets, net																53,079	59,942	22,362
Selling profit from sales-type leases																0	0	13,537
Net investment in lease receivable																2,913	2,926
Proceeds from the sale of lease receivable																0	64,155	0
Pre-tax net loss since the acquisition date																64,077	8,480	103,540
Equity Method Investments
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of buildings | building												17
Carrying value of equity method investments																365,997	373,192
Equity in earnings (losses) from real estate and other affiliates																(13,607)	$ 267,375	27,006
Circle T Ranch and Power Center
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity method investment, ownership percentage				50.00%													50.00%
Equity method investment, proceeds from sale				$ 13,000
Carrying value of equity method investments				11,900
Equity in earnings (losses) from real estate and other affiliates				$ 1,100
Mr. C Seaport
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity method investment, ownership percentage						35.00%											35.00%
Equity method investment, proceeds from sale						$ 800											$ 800
Mr. C Seaport | Equity Method Investments
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of hotel rooms | room						66											66
Bridges at Mint Hill
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity method investment, ownership percentage									90.50%
Equity in earnings (losses) from real estate and other affiliates									$ 9,500
Gain (loss) on sale or disposal of real estate and other assets, net									(8,800)
Assets divested from deconsolidation									22,000
Pre-tax net loss since the acquisition date									$ 3,800
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Monarch City Collection, Texas
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Area of land sold | a			229
Consideration received			$ 51,400
Carrying value of the asset			28,700
Gain (loss) on disposal			21,300
Transaction costs on sales of investments real estate			$ 1,500
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Hotel
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration received		$ 252,000
Carrying value of the asset		210,000
Gain (loss) on disposal		$ 39,100
Number of hotel rooms | room		909
Transaction costs		$ 2,900
Repayments of debt		$ 132,300
Operating Losses														$ 6,400	$ 12,500
Century Park | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Area of land sold | a	63
Area of real estate property sold | a	1,302,597
Number of buildings | building	17
Consideration received	$ 25,000
Carrying value of the asset	32,000
Gain (loss) on disposal	(7,400)
Transaction costs on sales of investments real estate	$ 400
Elk Grove
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Area of land sold | a					64
Carrying value of the asset					$ 10,800
Proceeds from sales of properties					24,600
Gain (loss) on sale or disposal of real estate and other assets, net					$ 13,700
West Windsor
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Area of land sold | a										658
Gain (loss) on sale or disposal of real estate and other assets, net							$ 8,000			$ 12,000
Assets divested from deconsolidation										27,500
Proceeds from sale										$ 40,000
Fellowship Drive100
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Area of land sold | a								13.5
Area of real estate property sold | ft²								203,257
Proceeds from sales of properties								$ 115,000								115,000
Gain (loss) on sale or disposal of real estate and other assets, net													$ 38,300
Number of parking spaces | space								550
Selling profit from sales-type leases																		$ 13,500
Amount derecognized from developments for sales-type leases																			$ 63,700
Net investment in lease receivable																76,100			$ 75,900
Transaction costs on sales of investments real estate																200
Payments to acquire real estate																600
Proceeds from the sale of lease receivable																$ 64,200
Cottonwood Mall
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sales of properties																	$ 10,000
Gain (loss) on sale or disposal of real estate and other assets, net											$ 24,100
Assets divested from deconsolidation											21,500
Proceeds from sale											$ 46,000
Square footage of building | ft²											196,975
Note receivable																	$ 36,000
Land Parcel in Holladay, Utah
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Area of land sold | a											54