Significant Accounting Policies - Schedule of Properties Contributed of Annualized Cash Rent (Details) - Annualized Rent	3 Months Ended
Mar. 31, 2026
Customer Concentration
Concentration of Credit Risk
Maximum percentage of annualized rent for any one tenant not individually disclosed (percent) (more than)	5.00%
Investment Property Concentration Risk \| One Vanderbilt Avenue
Concentration of Credit Risk
Percentage of concentration (percent)	12.00%
Investment Property Concentration Risk \| 11 Madison Avenue
Concentration of Credit Risk
Percentage of concentration (percent)	8.10%
Investment Property Concentration Risk \| 245 Park Avenue
Concentration of Credit Risk
Percentage of concentration (percent)	7.00%
Investment Property Concentration Risk \| 420 Lexington Avenue
Concentration of Credit Risk
Percentage of concentration (percent)	6.70%
Investment Property Concentration Risk \| 1515 Broadway
Concentration of Credit Risk
Percentage of concentration (percent)	5.80%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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