Property Acquisitions (Details) $ in Millions	Jun. 30, 2021 USD ($) ft²	Jan. 31, 2021 USD ($) ft²
Property Acquisitions
Area of Real Estate Property	27,962,796
885 Third Avenue
Property Acquisitions
Area of Real Estate Property		625,000
Gross Asset Valuation (in millions) | $		$ 387.9
461 Fifth Avenue
Property Acquisitions
Area of Real Estate Property	200,000
Gross Asset Valuation (in millions) | $	$ 28.0