Segments - Schedule of NOI for Each Reportable Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Property-related revenues		$ 182,629	$ 183,917
Property-related operating expenses		(71,740)	(70,309)
NOI attributable to noncontrolling interests in consolidated joint ventures		(22,908)	(22,712)
NOI from unconsolidated joint ventures	[1],[2]	5,602	5,305
Paramount's share of NOI	[3]	93,583	96,201
New York [Member]
Segment Reporting Information [Line Items]
Property-related revenues		117,804	117,226
Property-related operating expenses		(50,314)	(49,521)
NOI attributable to noncontrolling interests in consolidated joint ventures		(2,676)	(2,623)
NOI from unconsolidated joint ventures	[2]	3,555	3,363
Paramount's share of NOI	[3]	68,369	68,445
San Francisco [Member]
Segment Reporting Information [Line Items]
Property-related revenues		65,190	67,302
Property-related operating expenses		(20,765)	(20,268)
NOI attributable to noncontrolling interests in consolidated joint ventures		(20,232)	(20,089)
NOI from unconsolidated joint ventures	[2]	2,047	1,943
Paramount's share of NOI	[3]	26,240	28,888
Other [Member]
Segment Reporting Information [Line Items]
Property-related revenues		(365)	(611)
Property-related operating expenses		(661)	(520)
NOI attributable to noncontrolling interests in consolidated joint ventures		0	0
NOI from unconsolidated joint ventures	[2]	0	(1)
Paramount's share of NOI	[3]	$ (1,026)	$ (1,132)

[1] Excludes NOI from One Steuart Lane, a for-sale residential condominium project, and non-core assets (Market Center and 111 Sutter Street).

[2] Excludes NOI from One Steuart Lane, a for-sale residential condominium project, and non-core assets (Market Center and 111 Sutter Street).

[3] 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.