Segments - Schedule of NOI for Each Reportable Segment Information (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020		Dec. 31, 2019
Segment Reporting Information [Line Items]
Property-related revenues		$ 698,313	$ 700,410		$ 746,436
Property-related operating expenses		(265,438)	(273,440)		(274,836)
NOI from unconsolidated joint ventures		43,597	48,631		22,409
NOI	[1]	476,472	475,601		494,009
New York [Member]
Segment Reporting Information [Line Items]
Property-related revenues		443,384	454,071		482,648
Property-related operating expenses		(191,793)	(194,648)		(191,211)
NOI from unconsolidated joint ventures		11,303	11,540		13,151
NOI	[1]	262,894	270,963		304,588
San Francisco [Member]
Segment Reporting Information [Line Items]
Property-related revenues		258,188	234,893		238,808
Property-related operating expenses		(69,976)	(68,924)		(69,815)
NOI from unconsolidated joint ventures		32,221	38,892		9,065
NOI	[1]	220,433	204,861		178,058
Other [Member]
Segment Reporting Information [Line Items]
Property-related revenues		(3,259)	11,446	[2]	24,980	[2]
Property-related operating expenses		(3,669)	(9,868)	[2]	(13,810)	[2]
NOI from unconsolidated joint ventures		73	(1,801)	[2]	193	[2]
NOI	[1]	$ (6,855)	$ (223)	[2]	$ 11,363	[2]

[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.

[2] NOI for the years ended December 31, 2020 and 2019 includes NOI from discontinued operations. See Note 3, Discontinued Operations.