Segment Information - Real Estate Investments, at Cost of Company's Reportable Segments (Additional Information) (Details) - a	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
3001-3003 and 3025 JFK Boulevard
Segment Reporting Information [Line Items]
Lease agreement term	99 years	99 years
Other | Assets Held-for-sale
Segment Reporting Information [Line Items]
Area of land (in acres)	49.2
Other | Assets Held-for-sale | Land Held For Development
Segment Reporting Information [Line Items]
Area of land (in acres)	49.2	35.2