Deferred Financing and Leasing Costs (Deferred Financing and Leasing Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Finite-lived intangible assets
Deferred financing costs	$ 11,917	$ 11,917
Deferred leasing costs	190,849	229,798
Market value intangible	19,451	20,178
Origination value intangible	83,485	106,014
Finite-lived intangible assets, gross	305,702	367,907
Accumulated amortization:
Deferred financing costs	(10,152)	(8,713)
Deferred leasing costs	(76,174)	(97,840)
Market value intangible	(12,626)	(10,358)
Origination value intangible	(53,357)	(58,887)
Finite-lived intangible assets, accumulated amortization	(152,309)	(175,798)
Deferred financing and leasing costs, net	153,393	192,109
Amortization of deferred financing costs	3,974	4,395	$ 4,811
Amortization of intangible assets	$ 37,100	$ 44,200	$ 51,300