Segments - Schedule of Net Operating Income for Each Reportable Segment Information (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Property-related revenues		$ 735,571	$ 721,191	$ 711,956
Less property-related operating expenses:
Real estate related taxes		(149,150)	(145,870)	(144,941)
Other operating expenses	[1]	(154,128)	(148,095)	(132,481)
NOI attributable to noncontrolling interests in consolidated joint ventures		(92,096)	(89,948)	(82,587)
NOI from unconsolidated joint ventures		23,666	20,694	21,278
Paramount's share of NOI	[2]	363,863	357,972	373,225
New York [Member]
Segment Reporting Information [Line Items]
Property-related revenues		462,871	460,715	468,409
Less property-related operating expenses:
Real estate related taxes		(116,374)	(113,309)	(112,899)
Other operating expenses	[1]	(93,782)	(90,992)	(86,186)
NOI attributable to noncontrolling interests in consolidated joint ventures		(10,081)	(11,007)	(10,384)
NOI from unconsolidated joint ventures		16,148	12,880	13,257
Paramount's share of NOI	[2]	258,782	258,287	272,197
San Francisco [Member]
Segment Reporting Information [Line Items]
Property-related revenues		272,486	261,954	245,560
Less property-related operating expenses:
Real estate related taxes		(32,776)	(32,561)	(32,042)
Other operating expenses	[1]	(56,045)	(54,917)	(42,354)
NOI attributable to noncontrolling interests in consolidated joint ventures		(82,015)	(78,941)	(72,203)
NOI from unconsolidated joint ventures		7,445	7,681	7,733
Paramount's share of NOI	[2]	109,095	103,216	106,694
Other [Member]
Segment Reporting Information [Line Items]
Property-related revenues		214	(1,478)	(2,013)
Less property-related operating expenses:
Other operating expenses	[1]	(4,301)	(2,186)	(3,941)
NOI from unconsolidated joint ventures		73	133	288
Paramount's share of NOI	[2]	$ (4,014)	$ (3,531)	$ (5,666)

[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.