Shareholders' Equity (Tables)

9 Months Ended

Sep. 30, 2011

Stockholders' Equity Note [Abstract]

Summary Of Dividends Declared And Paid Per Share

	Nine Months Ended September 30,
	2011				2010
	Declared		Paid		Declared		Paid
Common shares	$	2.030	$	2.010	$	1.990	$	1.980
5.417% Series 1 Cumulative Convertible Preferred	$	1.016	$	1.016	$	1.016	$	1.016