Deferred Revenue and Other Liabilities (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 122,669		$ 131,559
Amortization of below market lease intangibles	7,000	$ 4,500
Unamortized in-place lease liabilities
Deferred Revenue Arrangement [Line Items]
Deferred revenue	104,946		112,405
Retainage payables and other
Deferred Revenue Arrangement [Line Items]
Deferred revenue	5,835		5,636
Potential earnout payments due
Deferred Revenue Arrangement [Line Items]
Deferred revenue	1,380		1,380
Tenant rent payments received in advance
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 10,508		$ 12,138