Mortgage Notes Payable, Net (Details) $ in Thousands				12 Months Ended
		Dec. 14, 2023 USD ($) ft² buildings	Oct. 26, 2023 USD ($) ft² buildings	Dec. 31, 2023 USD ($) Rate	Dec. 31, 2022 USD ($) Rate
Debt Instrument [Line Items]
Debt Instrument, Collateral				each collateralized by one or more buildings and related land included in real estate assets	each collateralized by one or more buildings and related land included in real estate assets
Mortgage notes payable, net				$ 4,166,379	$ 3,272,368
Number Of Variable Mortgage Loans				0	0
Santa Monica Business Park [Member]
Debt Instrument [Line Items]
Ownership Percentage	[1]				55.00%
Joint Venture Partner [Member] | Santa Monica Business Park [Member]
Debt Instrument [Line Items]
Ownership Percentage		45.00%
Santa Monica Business Park [Member]
Debt Instrument [Line Items]
Net Rentable Area (in sf) | ft²		1,200,000
Number of real estate properties | buildings		21
Mortgages [Member]
Debt Instrument [Line Items]
Mortgage notes payable, net				$ 4,166,379	$ 3,300,000
Long-Term Debt				4,200,000
Mortgages [Member] | 325 Main Street, 355 Main Street, 90 Broadway and Kendall Center Green Garage Properties [Member]
Debt Instrument [Line Items]
Debt			$ 600,000
Debt			$ 600,000
Mortgages [Member] | 325 Main Street, 355 Main Street, 90 Broadway and Kendall Center Green Garage Properties [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate			2.25%
Debt Instrument, Description of Variable Rate Basis			SOFR
Net Rentable Area (in sf) | ft²			898,000
Number of real estate properties | buildings			3
Debt - Total loan amount			$ 600,000
Mortgages [Member] | Santa Monica Business Park [Member]
Debt Instrument [Line Items]
Debt		$ 300,000
Debt		$ 300,000
Mortgages [Member] | Santa Monica Business Park [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.38%
Debt		$ 300,000
Debt Instrument, Description of Variable Rate Basis		SOFR
Long-Term Debt		$ 295,500
Debt - Total loan amount		300,000
Debt		$ 300,000
Fixed Rate Mortgage [Member]
Debt Instrument [Line Items]
Mortgage notes payable, net				$ 4,200,000	$ 3,300,000
Debt, Weighted Average Interest Rate | Rate				3.70%	3.24%
Fixed Rate Mortgage [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage | Rate				2.79%	2.79%
Fixed Rate Mortgage [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage | Rate				6.04%	3.43%

[1] During the year ended December 31, 2023, the Company completed the acquisition of its joint venture partner’s 45% ownership interest in Santa Monica Business Park, as described below in this Note 6 and Note 3.