Real Estate Intangibles (Details 1) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Real Estate Intangible Amortization [Abstract]
Rental income related to above/below market tenant leases, net	$ 278	$ (1,684)	$ 569	$ (1,901)
Property operating expenses related to above/below market ground leases, net	(309)	(308)	(931)	(962)
Depreciation and amortization related to in place lease intangibles and lease commissions	$ (30,137)	$ (26,137)	$ (95,610)	$ (82,434)