Concentration of Credit Risk (Details) ft² in Millions	12 Months Ended
	Dec. 31, 2023 ft² a property
Real Estate Properties
Number of properties (property)	259
Northern New Jersey/ New York City | Revenue Benchmark | Customer Concentration Risk
Real Estate Properties
Concentration risk (percentage)	24.60%
Office Building | Northern New Jersey/ New York City
Real Estate Properties
Number of properties (property)	43
Area of real estate property | ft²	2.6
Improved Land Parcels | Northern New Jersey/ New York City
Real Estate Properties
Number of properties (property)	13
Area of real estate property | a	68.0