Real Estate Related Party (Details) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)
New Jersey | Equity Method Investee
Related Party Transaction [Line Items]
Ownership percentage of equity method investment	25.00%	25.00%
Land Improvements [Member] | Philadelphia | Vice President [Member] | sale of development rights [Member]
Related Party Transaction [Line Items]
Land sold to related party	$ 3.2	$ 3.2
2019 sales | Acres of Developable Land | Disposal Group, Not Discontinued Operations | New Jersey | Equity Method Investee | land sale to related party [Member]
Related Party Transaction [Line Items]
Land sold to related party		$ 4.1
2019 sales current quarter | Acres of Developable Land | Disposal Group, Not Discontinued Operations | New Jersey | Equity Method Investee | land sale to related party [Member]
Related Party Transaction [Line Items]
Land sold to related party	$ 4.1