Deferred Revenue, Intangibles, Net and Other Liabilities (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 101,066		$ 112,202
Amortization of below market lease intangibles	5,700	$ 10,600
Unamortized in-place lease liabilities
Deferred Revenue Arrangement [Line Items]
Deferred revenue	85,162		95,360
Retainage payables and other
Deferred Revenue Arrangement [Line Items]
Deferred revenue	6,283		5,437
Tenant rent payments received in advance
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 9,621		$ 11,405