Debt - Summary of Outstanding Debt (Details) - USD ($) $ in Thousands		9 Months Ended
	Aug. 05, 2025	Sep. 30, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Notes and mortgages payable, Interest Rate		4.26%
Notes and mortgages payable		$ 3,732,050	$ 3,692,050
Less: unamortized deferred financing costs		(20,546)	(15,420)
Total notes and mortgages payable, net		$ 3,711,504	3,676,630
1633 Broadway [Member] | Mortgages and Notes Payable with Fixed Rate [Member]
Debt Instrument [Line Items]
Paramount Ownership		90.00%
Maturity date of debt		2029-12
Notes and mortgages payable, Interest Rate		2.99%
Notes and mortgages payable		$ 1,250,000	1,250,000
One Market Plaza [Member] | Mortgages and Notes Payable with Fixed Rate [Member]
Debt Instrument [Line Items]
Paramount Ownership		49.00%
Maturity date of debt		2027-02
Notes and mortgages payable, Interest Rate		4.08%
Notes and mortgages payable		$ 850,000	850,000
1301 Avenue of the Americas [Member]
Debt Instrument [Line Items]
Maturity date of debt	2030-08	2026-08
Notes and mortgages payable, Interest Rate	6.39%
1301 Avenue of the Americas [Member] | Mortgages and Notes Payable with Variable Rate [Member]
Debt Instrument [Line Items]
Paramount Ownership		100.00%
Maturity date of debt		2030-08
Notes and mortgages payable, Interest Rate		6.39%
Notes and mortgages payable		$ 900,000	860,000
31 West 52nd Street [Member] | Mortgages and Notes Payable with Fixed Rate [Member]
Debt Instrument [Line Items]
Paramount Ownership		100.00%
Maturity date of debt		2026-06
Notes and mortgages payable, Interest Rate		3.80%
Notes and mortgages payable		$ 500,000	500,000
300 Mission Street [Member] | Mortgages and Notes Payable with Fixed Rate [Member]
Debt Instrument [Line Items]
Paramount Ownership		31.10%
Maturity date of debt		2026-10
Notes and mortgages payable, Interest Rate		4.50%
Notes and mortgages payable		$ 232,050	$ 232,050