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Common And Common Equivalent Shares (Tables)

12 Months Ended

Dec. 31, 2011

Common And Common Equivalent Shares [Abstract]

Schedule Of Calculation Of Shares Used In The Basic And Diluted Net Income Per Share

		Years Ended December 31,
		2011				2010				2009
Weighted average number of common shares outstanding			47,706				46,630				45,573
Weighted average number of dilutive common share equivalents			1,090				940				898
Weighted average number of common and common equivalent shares outstanding			48,796				47,570				46,471
Antidilutive securities not included in the diluted earnings per share calculation			45				464				2,348

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- Definition

Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit).

+ References

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

-Topic 260

-SubTopic 10

-Publisher FASB

-Number

-Article

-Subparagraph

-Name Accounting Standards Codification

-Paragraph 1

-Section 50

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

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