Segments - Schedule of Paramount's Share of Net Operating Income for Each Reportable Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Property-related revenues		$ 168,835	$ 188,123	$ 523,654	$ 553,856
Less property-related operating expenses:
Real estate related taxes		(38,559)	(37,955)	(115,264)	(112,379)
Other operating expenses	[1]	(40,833)	(42,361)	(117,062)	(113,869)
NOI attributable to noncontrolling interests in consolidated joint ventures		(18,686)	(23,723)	(61,385)	(70,532)
NOI from unconsolidated joint ventures		4,743	5,384	14,706	16,611
Paramount's share of NOI	[2]	75,500	89,468	244,649	273,687
New York [Member]
Segment Reporting Information [Line Items]
Property-related revenues		112,225	116,383	336,082	347,669
Less property-related operating expenses:
Real estate related taxes		(30,086)	(29,440)	(88,942)	(87,191)
Other operating expenses	[1]	(24,346)	(26,172)	(72,427)	(69,801)
NOI attributable to noncontrolling interests in consolidated joint ventures		(3,340)	(2,424)	(10,048)	(7,600)
NOI from unconsolidated joint ventures		3,156	3,407	9,620	10,442
Paramount's share of NOI	[2]	57,609	61,754	174,285	193,519
San Francisco [Member]
Segment Reporting Information [Line Items]
Property-related revenues		56,040	71,523	185,981	206,337
Less property-related operating expenses:
Real estate related taxes		(8,473)	(8,515)	(26,322)	(25,188)
Other operating expenses	[1]	(14,610)	(14,983)	(38,177)	(41,203)
NOI attributable to noncontrolling interests in consolidated joint ventures		(15,346)	(21,299)	(51,337)	(62,932)
NOI from unconsolidated joint ventures		1,570	2,018	4,960	6,128
Paramount's share of NOI	[2]	19,181	28,744	75,105	83,142
Other [Member]
Segment Reporting Information [Line Items]
Property-related revenues		570	217	1,591	(150)
Less property-related operating expenses:
Real estate related taxes		0	0	0	0
Other operating expenses	[1]	(1,877)	(1,206)	(6,458)	(2,865)
NOI attributable to noncontrolling interests in consolidated joint ventures		0	0	0	0
NOI from unconsolidated joint ventures		17	(41)	126	41
Paramount's share of NOI	[2]	$ (1,290)	$ (1,030)	$ (4,741)	$ (2,974)

[1] Primarily comprised of cleaning, security, repairs and maintenance, and utilities.

[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 present Paramount’s share of NOI which represents our share of NOI of consolidated and unconsolidated joint ventures, based on our percentage ownership in the underlying assets. 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.