Deferred Costs, Acquired Lease Intangibles and Goodwill Schedule of Deferred Costs, Net (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Leasing costs	$ 92,601	$ 90,198
Leasing costs, Accumulated Amortization	(29,294)	(27,459)
Financing costs	27,671	27,416
Financing costs, Accumulated Amortization	(13,943)	(11,217)
Total deferred costs, Gross Amount	120,272	117,614
Total deferred costs, Accumulated Amortization	$ (43,237)	$ (38,676)