Debt (Capitalized Interest, Deferred Financing Costs and Debt Payoff Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Debt [Abstract]
Capitalized interest	$ 0	$ 0	$ 0	$ 0
Deferred costs, net of accumulated amortization	2,483		2,483		$ 1,383
Amortization of deferred costs	442	645	1,703	1,945
Unamortized deferred costs and defeasance premiums expensed	$ 312	$ (15)	$ 586	$ 1,076