Real Estate Intangibles (Details 1) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Real Estate Intangible Amortization [Abstract]
Rental income related to above/below market tenant leases, net	$ 748,000	$ 1,120,000	$ 3,340,000
Property operating expenses related to above/below market ground leases, net	(1,208,000)	(1,285,000)	(1,161,000)
Depreciation and amortization related to in place lease intangibles and lease commissions	$ (246,938,000)	$ (103,044,000)	$ (98,856,000)