Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2011

Significant Accounting Policies Tables [Abstract]

Schedule Of Earnings Per Share

		Three Months Ended				Nine Months Ended
		September 30,		September 30,		September 30,		September 30,
		2011		2010		2011		2010
		(Share amounts in 000's)
Net income	$	149,146	$	162,642	$	321,371	$	426,509
Weighted average common shares outstanding - basic		152,817		152,479		152,772		152,286
Effect of dilutive instruments		1,463		1,713		1,646		1,955
Weighted average common shares outstanding - fully diluted		154,280		154,192		154,418		154,241
Net income per common share - basic	$	0.98	$	1.07	$	2.10	$	2.80
Net income per common share - fully diluted	$	0.97	$	1.05	$	2.08	$	2.77
Number of shares not included in dilutive earnings per share that would have been anti-dilutive because the exercise price was greater than the average market price of the common
shares		1,168		989		968		989