Real Estate Intangibles (Details 1) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Real Estate Intangible Amortization [Abstract]
Rental income related to above/below market tenant leases, net	$ (45,000)	$ 148,000
Property operating expenses related to above/below market ground leases, net	(311,000)	(320,000)
Depreciation and amortization related to in place lease intangibles and lease commissions	$ (78,867,000)	$ (50,576,000)