Real Estate Intangibles (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Real Estate Intangible Amortization [Abstract]
Rental income related to above/below market tenant leases, net	$ (2,746)	$ 509	$ 748
Property operating expenses related to above/below market ground leases, net	(1,272)	(1,248)	(1,208)
Depreciation and amortization related to in place lease intangibles and lease commissions	$ (115,855)	$ (214,966)	$ (246,938)