XML 53 R35.htm IDEA: XBRL DOCUMENT
v2.4.0.6

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 |

X
- Details
Name: | us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract
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