Common Share Capitalization (Summary Of Common Shares Outstanding) (Details) - shares	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Shares Outstanding, period begin	33,126,012	33,449,678
Shares repurchased	(163,033)	0
Common Shares Outstanding, period end	32,962,979	33,449,678