Deferred Costs (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Components of Deferred Costs Net [Abstract]
Leasing Costs, Total Cost	$ 159,744	$ 155,885
Financing Costs, Total Cost	42,265	40,317
Total Cost	202,009	196,202
Leasing Costs, Accumulated Amortization	(63,136)	(58,805)
Financing Costs, Accumulated Amortization	(15,992)	(14,443)
Total, Accumulated Amortization	(79,128)	(73,248)
Leasing, Deferred Costs, Net	96,608	97,080
Financing Costs, Deferred Costs, Net	26,273	25,874
Deferred Costs, Net	$ 122,881	$ 122,954