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The carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee, including those with credit balances. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Ownership percentage of partner in Joint Venture.

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Area of land held.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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Investment in Unconsolidated Joint Ventures - Narrative (Details) $ in Thousands, ft² in Millions		1 Months Ended			3 Months Ended		6 Months Ended
	Jul. 28, 2021 USD ($)	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($) ft²	Feb. 29, 2020 USD ($) a	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Schedule of Equity Method Investments [Line Items]
Notes payable					$ 2,050,173		$ 2,050,173		$ 2,162,719
Repayments of notes payable							8,102	$ 30,760
Gain on sale of interest					$ 0	$ (231)	39	45,999
Contributions to unconsolidated joint ventures							$ 656	$ 2,341
DC Charlotte Plaza LLLP
Schedule of Equity Method Investments [Line Items]
Ownership interest percentage					50.00%		50.00%
DC Charlotte Plaza LLLP \| Minimum
Schedule of Equity Method Investments [Line Items]
Cap interest rate					6.50%		6.50%
DC Charlotte Plaza LLLP \| Maximum
Schedule of Equity Method Investments [Line Items]
Cap interest rate					8.00%		8.00%
Carolina Square Holdings LP \| Mortgages
Schedule of Equity Method Investments [Line Items]
Notes payable		$ 135,700
Carolina Square Holdings LP \| Mortgages \| LIBOR
Schedule of Equity Method Investments [Line Items]
Basis spread on variable rate		1.80%
Carolina Square Holdings LP \| Construction Loan
Schedule of Equity Method Investments [Line Items]
Repayments of notes payable		$ 77,500
Pro-rata distribution		$ 26,000
Carolina Square Holdings LP \| NR 123 Franklin LLC
Schedule of Equity Method Investments [Line Items]
Ownership percentage of partner in joint venture		50.00%
Charlotte Gateway Village, LLC
Schedule of Equity Method Investments [Line Items]
Ownership percentage of partner in joint venture			50.00%
Square footage of real estate property (square feet) \| ft²			1.1
Gross purchase price			$ 52,200
Internal rate of return			17.00%
Gain on sale of interest			$ 44,700
Estimated state income tax			$ 188
Wildwood Associates
Schedule of Equity Method Investments [Line Items]
Gross purchase price				$ 900
Gain on sale of interest				$ 1,300
Area of land \| a				6.3
Elimination of the remaining negative basis in the joint venture				$ 520
Neuoff JV \| Subsequent Event
Schedule of Equity Method Investments [Line Items]
Ownership interest percentage	50.00%
Contributions to unconsolidated joint ventures	$ 35,100
Neuoff JV \| Neuhoff Holdings LLC \| Subsequent Event
Schedule of Equity Method Investments [Line Items]
Ownership percentage of partner in joint venture	50.00%
715 Ponce JV \| Subsequent Event
Schedule of Equity Method Investments [Line Items]
Ownership interest percentage	50.00%
Contributions to unconsolidated joint ventures	$ 4,000
715 Ponce JV \| 715 Ponce Holdings LLC \| Subsequent Event
Schedule of Equity Method Investments [Line Items]
Ownership percentage of partner in joint venture	50.00%