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Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2012

Earnings Per Share [Abstract]

Computations Of Basic And Diluted Earnings Per Share

	Year ended December 31
	2012			2011			2010
Net income	$	278,000		$	214,945		$	178,981
Shares:
Weighted average number of common shares outstanding		31,513			31,217			31,234
Dilutive stock options and SOSARs		254			497			422
Dilutive non-vested stock awards		16			61			79
Diluted weighted average number of common shares outstanding		31,783			31,775			31,735
Basic earnings per share	$	8.82		$	6.89		$	5.73
Diluted earnings per share	$	8.75		$	6.76		$	5.64

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- Definition

Tabular disclosure of the numerators and the denominators of the basic and diluted per-share (or per-unit) computations for income from continuing operations, including the effect that has been given to preferred dividends.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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