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Organization (Details)	12 Months Ended
	Dec. 31, 2020 ft² property	Dec. 24, 2020	Jun. 05, 2019
Real Estate Properties [Line Items]
Number of Properties | property	64
Square Feet | ft²	19,962,414
Consolidated portfolio
Real Estate Properties [Line Items]
Number of Properties | property	61
Square Feet | ft²	17,791,293
Unconsolidated portfolio
Real Estate Properties [Line Items]
Number of Properties | property	3
Square Feet | ft²	2,171,121
Customer Concentration Risk | Rentable Square Feet | 15 largest tenants
Real Estate Properties [Line Items]
Contribution risk, percentage	34.40%
Customer Concentration Risk | Rentable Square Feet | Technology Sector
Real Estate Properties [Line Items]
Contribution risk, percentage	29.00%
Customer Concentration Risk | Rentable Square Feet | Media And Entertainment Sector
Real Estate Properties [Line Items]
Contribution risk, percentage	18.00%
California | Geographic Concentration Risk
Real Estate Properties [Line Items]
Contribution risk, percentage	78.20%
Office | Consolidated portfolio
Real Estate Properties [Line Items]
Number of Properties | property	52
Square Feet | ft²	14,062,484
Office | Unconsolidated portfolio
Real Estate Properties [Line Items]
Number of Properties | property	1
Square Feet | ft²	1,488,266
Studio | Consolidated portfolio
Real Estate Properties [Line Items]
Number of Properties | property	3
Square Feet | ft²	1,224,403
Land | Consolidated portfolio
Real Estate Properties [Line Items]
Number of Properties | property	6
Square Feet | ft²	2,504,406
Land | Unconsolidated portfolio
Real Estate Properties [Line Items]
Number of Properties | property	2
Square Feet | ft²	682,855
Joint Venture, Blackstone
Real Estate Properties [Line Items]
Joint venture, ownership percentage	20.00%		20.00%
Joint Venture Sun Valley Property
Real Estate Properties [Line Items]
Joint venture, ownership percentage	50.00%	50.00%

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