Investment in Unconsolidated Entities - Schedule of Components of Investment In Unconsolidated Entities(Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]
Investment in unconsolidated joint ventures	$ 16,825	$ 16,912
Equity basis of the joint venture investments
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	(4,260)	(4,733)
Cost of the joint venture investments in excess of the joint venture book value
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	$ 21,085	$ 21,645