Segments - Schedule of NOI for Each Reportable Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Segment Reporting Information [Line Items]
Property-related revenues		$ 183,917	$ 171,697
Property-related operating expenses		(70,309)	(66,661)
NOI from unconsolidated joint ventures (excluding One Steuart Lane)		10,381	11,234
NOI	[1]	123,989	116,270
New York [Member]
Segment Reporting Information [Line Items]
Property-related revenues		117,226	115,405
Property-related operating expenses		(49,521)	(48,211)
NOI from unconsolidated joint ventures (excluding One Steuart Lane)		3,363	2,818
NOI	[1]	71,068	70,012
San Francisco [Member]
Segment Reporting Information [Line Items]
Property-related revenues		67,302	57,089
Property-related operating expenses		(20,268)	(17,292)
NOI from unconsolidated joint ventures (excluding One Steuart Lane)		7,019	8,354
NOI	[1]	54,053	48,151
Other [Member]
Segment Reporting Information [Line Items]
Property-related revenues		(611)	(797)
Property-related operating expenses		(520)	(1,158)
NOI from unconsolidated joint ventures (excluding One Steuart Lane)		(1)	62
NOI	[1]	$ (1,132)	$ (1,893)

[1] NOI is used to measure the operating performance of our properties. NOI consists of rental revenue (which includes property rentals, tenant reimbursements and lease termination income) and certain other property-related revenue less operating expenses (which includes property-related expenses such as cleaning, security, repairs and maintenance, utilities, property administration and real estate taxes). We use NOI internally as a performance measure and believe it provides useful information to investors regarding our financial condition and results of operations because it reflects only those income and expense items that are incurred at the property level. Other real estate companies may use different methodologies for calculating NOI and, accordingly, our presentation of NOI may not be comparable to other real estate companies.