Deferred Costs - Deferred Costs (Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Components of Deferred Costs Net [Abstract]
Leasing costs, Total Cost	$ 146,135	$ 165,741
Total Cost	149,730	169,319
Leasing costs, Accumulated Amortization	(56,942)	(67,342)
Total, Accumulated Amortization	(58,388)	(67,900)
Leasing costs, Deferred Costs, net	89,193	98,399
Financing costs, Deferred Costs, net	8,097
Deferred Costs	91,342	101,419
Revolving Credit Facility
Components of Deferred Costs Net [Abstract]
Financing costs, Total Cost	3,595	3,578
Financing costs, Accumulated Amortization	(1,446)	(558)
Financing costs, Deferred Costs, net	$ 2,149	$ 3,020