Investments in Unconsolidated Entities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Variable Interest Entity [Line Items]
Investments in joint ventures included in unconsolidated entities	$ 1,686,041		$ 1,686,041		$ 1,386,672
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Investments in joint ventures included in unconsolidated entities	72,700		72,700		$ 74,400
Loss attributable to variable interest entities	$ 2,600	$ 1,600	$ 4,600	$ 4,000