Deferred Revenue, Intangibles, Net and Other Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Deferred Revenue Disclosure [Abstract]
Unamortized below market lease liabilities	$ 68,057		$ 69,501
Retainage payables and other	3,042		2,489
Operating lease liability	27,315		0
Tenant rent payments received in advance	6,045		11,642
Subtotal	104,459		83,632
Less: Liabilities of assets held for sale	(1,981)		0
Total	102,478		$ 83,632
Amortization of below market lease intangibles	$ 1,400	$ 3,300