Impairment (Details) ft² in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($) ft² a building	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($) ft² a
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment, long-lived asset	$ 0		$ 0
Impairment charge for real estate	0	$ 13,068,000	0	$ 13,068,000
Number of buildings | building		17
Impairment of investment in real estate and other affiliates	$ 0	$ 0	$ 0	$ 0
Minimum
Impaired Long-Lived Assets Held and Used [Line Items]
Weighted market scenarios, assumed lease-up period		24 months
Maximum
Impaired Long-Lived Assets Held and Used [Line Items]
Weighted market scenarios, assumed lease-up period		48 months
Fair Value, Measurements, Nonrecurring | Measurement Input, Cap Rate | Valuation, Income Approach
Impaired Long-Lived Assets Held and Used [Line Items]
Measurement input		0.0875		0.0875
Century Park
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment charge for real estate		$ 13,100,000
Area of land | a		63		63
Area of real estate property (in sqft) | ft²		1.3		1.3