Property Acquisitions - 2021 Acquisitions (Details) $ in Millions	Dec. 31, 2022 ft²	Dec. 31, 2021 USD ($) ft²
Business Acquisition [Line Items]
Approximate Square Feet	29,716,041
885 Third Avenue - Office Condominium Units (3)
Business Acquisition [Line Items]
Approximate Square Feet		625,000
Gross Asset Valuation (in millions) | $		$ 387.9
461 Fifth Avenue
Business Acquisition [Line Items]
Approximate Square Feet		200,000
Gross Asset Valuation (in millions) | $		$ 28.0
1591-1597 Broadway (Crowne Plaza)
Business Acquisition [Line Items]
Approximate Square Feet		7,684
Gross Asset Valuation (in millions) | $		$ 121.0
690 Madison Avenue
Business Acquisition [Line Items]
Approximate Square Feet		7,848
Gross Asset Valuation (in millions) | $		$ 72.2