Acquired Intangible Assets and Liabilities (Schedule of Future Amortization Finite Lived Intangible Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Acquired in-place lease value
Finite-Lived Intangible Assets [Line Items]
2017	$ 54,088
2018	47,640
2019	40,515
2020	36,561
2021	33,958
Thereafter	166,488
Net	379,250	$ 428,448
Customer contracts and trade names
Finite-Lived Intangible Assets [Line Items]
2017	69,608
2018	69,608
2019	69,608
2020	69,608
2021	69,608
Thereafter	541,410
Net	$ 889,450