Significant Accounting Policies - Schedule of Properties Contributed of Annualized Cash Rent (Details) - Annualized Rent - Customer Concentration	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
One Vanderbilt Avenue
Concentration of Credit Risk
Percentage of concentration (percent)	16.00%	14.10%
11 Madison Avenue
Concentration of Credit Risk
Percentage of concentration (percent)	8.30%	7.80%	10.80%
420 Lexington Avenue
Concentration of Credit Risk
Percentage of concentration (percent)	6.70%	6.30%	8.30%
1515 Broadway
Concentration of Credit Risk
Percentage of concentration (percent)	6.40%	5.80%	8.10%
1185 Avenue of the Americas
Concentration of Credit Risk
Percentage of concentration (percent)	5.60%	5.10%	8.00%
280 Park Avenue
Concentration of Credit Risk
Percentage of concentration (percent)	5.50%	5.10%	6.70%
245 Park Avenue
Concentration of Credit Risk
Percentage of concentration (percent)	5.50%	10.00%
919 Third Avenue
Concentration of Credit Risk
Percentage of concentration (percent)			5.30%
485 Lexington Avenue
Concentration of Credit Risk
Percentage of concentration (percent)			5.30%
555 West 57th Street
Concentration of Credit Risk
Percentage of concentration (percent)			5.20%