Deferred Costs, Acquired Lease Intangibles and Goodwill Schedule of Deferred Costs, Net (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Leasing costs	$ 91,417	$ 90,198
Leasing costs, Accumulated Amortization	(27,488)	(27,459)
Financing costs	27,671	27,416
Financing costs, Accumulated Amortization	(12,568)	(11,217)
Total deferred costs, Gross Amount	119,088	117,614
Total deferred costs, Accumulated Amortization	$ (40,056)	$ (38,676)