Common Share Capitalization (Summary Of Common Shares Outstanding) (Details) - shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Shares Outstanding, period begin	33,126,012	33,449,678	25,428,186
Shares issued	0	0	8,000,000
Shares repurchased	(833,784)	(325,613)	0
Shares issued in connection with incentive fee payment	0	0	19,670
Director LTIP Units exercised	2,475	1,947	1,822
Common Shares Outstanding, period end	32,294,703	33,126,012	33,449,678