Deferred Charges Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Entity Information [Line Items]
Deferred Finance Costs, Net	$ 2,358
Mortgages [Member]
Entity Information [Line Items]
Deferred Finance Costs, Net	2,400	$ 3,500
Unsecured Debt [Member]
Entity Information [Line Items]
Deferred Finance Costs, Net	35,300	24,500
Line of Credit [Member]
Entity Information [Line Items]
Deferred Finance Costs, Net	$ 1,900	$ 3,100