Deferred Financing and Leasing Costs (Intangible Amortization Schedule) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Deferred financing and leasing costs, net	$ 153,393	$ 192,109
Leases, Acquired-in-Place, Market Adjustment [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
2017	1,446
2018	1,425
2019	900
2020	5
2021	(142)
Thereafter	(1,181)
Deferred financing and leasing costs, net	2,453
Leases, Acquired-in-Place [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
2017	10,985
2018	7,310
2019	4,316
2020	2,164
2021	1,450
Thereafter	3,903
Deferred financing and leasing costs, net	$ 30,128