Real Estate Investments - Textual (Details) $ in Thousands		3 Months Ended		12 Months Ended
	Feb. 02, 2021 USD ($)	Mar. 31, 2021 USD ($) a parcel	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($) a parcel	Feb. 02, 2021 ft²	Feb. 02, 2021 a
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Investment in joint venture		$ 415,823		$ 389,811
Net gain on sale of undepreciated real estate		1,993	$ 0
Assets held for sale, net		7,349		7,349
Other - Land | Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale, net		$ 7,300		$ 7,300
Other - Land | Held-for-sale | Other
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Area of land (in acres) | a		35.2		35.2
Number of parcels of land | parcel		2		2
3025 JFK Venture
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Lease agreement term	99 years
Area of land (in acres)					1	1
Investment in joint venture	$ 34,800	$ 34,800
Net gain on sale of undepreciated real estate	$ 2,000