Real Estate Intangibles (Details 1) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Real Estate Intangible Amortization [Abstract]
Rental income related to above/below market tenant leases, net	$ 210	$ (424)	$ 290	$ (217)
Property operating expenses related to above/below market ground leases, net	(311)	(334)	(622)	(653)
Depreciation and amortization related to in place lease intangibles and lease commissions	$ (31,019)	$ (31,973)	$ (65,473)	$ (56,297)