XML 23 R25.htm IDEA: XBRL DOCUMENT v2.3.0.15

Net Income Per Common Share (Tables)

9 Months Ended

Sep. 30, 2011

Net Income Per Common Share [Abstract]

Summary of weighted average number of common shares outstanding

		Three Months Ended								Nine Months Ended
		September 30,								September 30,
		2011				2010				2011				2010
Denominator:
Basic common shares outstanding			44,302				45,746				44,845				45,715
Effect of dilutive stock options and restricted stock			485				605				448				698
Diluted common shares outstanding			44,787				46,351				45,293				46,413

X

- Details

Name:	us-gaap_EarningsPerShareAbstract
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- 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

+ Details

Name:	us-gaap_ScheduleOfWeightedAverageNumberOfSharesTableTextBlock
Namespace Prefix:	us-gaap
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration