Deferred Costs (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Components of Deferred Costs Net [Abstract]
Leasing Costs, Total Cost	$ 155,885	$ 150,331
Financing Costs, Total Cost	40,317	40,246
Total Cost	196,202	190,577
Leasing Costs, Accumulated Amortization	(58,805)	(58,343)
Financing Costs, Accumulated Amortization	(14,443)	(9,991)
Total, Accumulated Amortization	(73,248)	(68,334)
Leasing Costs, Deferred Costs, net	97,080	91,988
Financing Costs, Deferred Costs, net	25,874	30,255
Deferred Costs	$ 122,954	$ 122,243