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Earnings Per Share | 12 Months Ended
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Dec. 31, 2011
Earnings Per Share [Abstract] |
Earnings Per Share |
7. | Earnings Per Share
The following table sets forth the computation of diluted weighted average common and potential common shares outstanding for the years ended December 31, 2011, 2010 and 2009, respectively (in thousands).
|  | Year Ended December 31, |
|  | 2011 |  |  | 2010 |  |  | 2009 |
Basic weighted average common shares outstanding |  |  | 32,043 |  |  |  | 31,494 |  |  |  | 30,648 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |
Options |  |  | — |  |  |  | — |  |  |  | 159 |
Employee Stock Purchase Plan |  |  | — |  |  |  | — |  |  |  | 238 |
Unvested Restricted Stock (including Restricted Stock Units) |  |  | — |  |  |  | — |  |  |  | 179 |
Diluted weighted average common and potential common shares outstanding |  |  | 32,043 |  |  |  | 31,494 |  |  |  | 31,224 |
Weighted average options, restricted stock units and ESPP shares to purchase a total of 4,656,929 shares, 3,675,163 shares and 3,149,937 shares of common stock for the years ended December 31, 2011, 2010 and 2009, respectively, were outstanding but not included in the computation of diluted earnings per share as their effect was anti-dilutive.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6920599&loc=d3e1252-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=6945512&loc=d3e4984-109258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6920599&loc=d3e1278-109256 Reference 5: 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 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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