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Earnings Per Share | 12 Months Ended
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Dec. 31, 2011
Earnings Per Share | 10. Earnings Per Share Earnings per share is computed in accordance with ASC 260, Earnings per Share. Basic earnings per share is computed on the basis of weighted average outstanding common shares. Diluted earnings per share is computed on the basis of basic weighted average outstanding common shares adjusted for the dilutive effect of stock options and other outstanding dilutive securities. The following table reconciles the average share amounts used to compute both basic and diluted earnings per share (in thousands):
|  |  | September 30, |  |  |  | September 30, |  |  |  | September 30, |
|  | Years Ended December 31, |
|  | 2011 |  |  | 2010 |  |  | 2009 |
Weighted average share outstanding: |  |  |  |  |  |  |  |  |  |  |  |
Basic weighted average shares outstanding |  |  | 33,457 |  |  |  | 33,560 |  |  |  | 34,368 |
Add: Dilutive effect of stock options, restricted stock awards and other dilutive securities |  |  | 738 |  |  |  | 310 |  |  |  | 186 |
Diluted weighted average shares outstanding |  |  | 34,195 |  |  |  | 33,870 |  |  |  | 34,554 |
For the years ended December 31, 2011, 2010 and 2009, 3.3 million, 5.4 million and 5.6 million, respectively, options to purchase shares, contingently issuable shares, and common stock warrants were excluded from the diluted net income per share computation as their effect would be 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FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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