Segments - Schedule of NOI for Each Reportable Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Segment Reporting Information [Line Items]
Property-related revenues		$ 183,104	$ 167,686	$ 365,733	$ 351,603
Property-related operating expenses		(74,192)	(71,078)	(145,932)	(141,387)
NOI attributable to noncontrolling interests in consolidated joint ventures		(23,901)	(22,564)	(46,809)	(45,276)
NOI from unconsolidated joint ventures	[1]	5,625	5,503	11,227	10,808
Paramount's share of NOI	[2]	90,636	79,547	184,219	175,748
New York [Member]
Segment Reporting Information [Line Items]
Property-related revenues		113,482	106,837	231,286	224,063
Property-related operating expenses		(51,066)	(48,685)	(101,380)	(98,206)
NOI attributable to noncontrolling interests in consolidated joint ventures		(2,500)	(2,743)	(5,176)	(5,366)
NOI from unconsolidated joint ventures	[1]	3,480	3,404	7,035	6,767
Paramount's share of NOI	[2]	63,396	58,813	131,765	127,258
San Francisco [Member]
Segment Reporting Information [Line Items]
Property-related revenues		69,624	61,010	134,814	128,312
Property-related operating expenses		(22,128)	(21,814)	(42,893)	(42,082)
NOI attributable to noncontrolling interests in consolidated joint ventures		(21,401)	(19,821)	(41,633)	(39,910)
NOI from unconsolidated joint ventures	[1]	2,063	2,039	4,110	3,982
Paramount's share of NOI	[2]	28,158	21,414	54,398	50,302
Other [Member]
Segment Reporting Information [Line Items]
Property-related revenues		(2)	(161)	(367)	(772)
Property-related operating expenses		(998)	(579)	(1,659)	(1,099)
NOI attributable to noncontrolling interests in consolidated joint ventures		0	0	0	0
NOI from unconsolidated joint ventures	[1]	82	60	82	59
Paramount's share of NOI	[2]	$ (918)	$ (680)	$ (1,944)	$ (1,812)

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

[2] 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.