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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. 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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Investments in Non-Consolidated Entities - Schedule of Investment in Non-Consolidated Entities (Details) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Jan. 31, 2023 USD ($)	Sep. 30, 2023 USD ($) ft²	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) ft² officeAsset	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($) officeAsset
Investments in and Advances to Affiliates [Line Items]
Investment Balance as of		$ 52,351		$ 52,351		$ 58,206
Equity in earnings (losses) of non-consolidated entities		$ (5)	$ (1,340)	$ 2,585	$ 15,580
NNN MFG Cold JV L.P.
Investments in and Advances to Affiliates [Line Items]
Percentage Ownership at		20.00%		20.00%
Investment Balance as of		$ 21,082		$ 21,082		26,592
Equity in earnings (losses) of non-consolidated entities				$ (2,418)	(1,243)
NNN Office JV L.P.
Investments in and Advances to Affiliates [Line Items]
Percentage Ownership at		20.00%		20.00%
Investment Balance as of		$ 15,850		$ 15,850		$ 12,900
Equity in earnings (losses) of non-consolidated entities				$ 720	16,870
NNN Office JV L.P. \| NNN Office Joint Venture Properties
Investments in and Advances to Affiliates [Line Items]
Number of properties sold \| officeAsset				1		3
Aggregate gain on sale of properties				$ 1,010		$ 22,896
Etna Park 70 LLC
Investments in and Advances to Affiliates [Line Items]
Percentage Ownership at		90.00%		90.00%
Investment Balance as of		$ 13,297		$ 13,297		12,975
Equity in earnings (losses) of non-consolidated entities				$ (184)	(101)
Approx. Developable Acres \| ft²		250,020		250,020
Real estate investment property, estimated cost		$ 29,200		$ 29,200
Real estate investment properties, deposit		$ 8,500		$ 8,500
Etna Park East LLC
Investments in and Advances to Affiliates [Line Items]
Percentage Ownership at		90.00%		90.00%
Investment Balance as of		$ 2,122		$ 2,122		2,126
Equity in earnings (losses) of non-consolidated entities				$ (141)	(90)
BSH Lessee L.P.
Investments in and Advances to Affiliates [Line Items]
Percentage Ownership at		25.00%		25.00%
Investment Balance as of		$ 0		$ 0		$ 3,613
Equity in earnings (losses) of non-consolidated entities				$ 4,608	$ 144
BSH Lessee L.P. \| BSH Lessee Joint Venture Properties
Investments in and Advances to Affiliates [Line Items]
Aggregate gain on sale of properties	$ 4,791