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Earnings Per Share | 9 Months Ended
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Sep. 30, 2011
Earnings Per Share [Abstract] |
Earnings Per Share | Note 3 – Earnings Per Share Basic earnings per share is computed using the weighted-average number of shares outstanding. Diluted earnings per share is computed using the weighted-average number of shares outstanding adjusted for the incremental shares attributed to outstanding stock equivalents during the three and nine months ended September 30, 2011 and 2010. Stock equivalents include common shares issuable upon the exercise of stock options and other equity instruments, and are computed using the treasury stock method. Under the treasury stock method, the exercise price of a share, the amount of compensation cost, if any, for future service that the Company has not yet recognized and the amount of estimated tax benefits that would be recorded in paid-in-capital, if any, when the share is exercised are assumed to be used to repurchase shares in the current period. The following table sets forth the calculation of basic and diluted earnings per share.
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
(in thousands, except per share data) |  | 2011 |  |  | 2010 |  |  | 2011 |  |  | 2010 |
Net income |  | $ | 19,867 |  |  | $ | 22,469 |  |  | $ | 49,081 |  |  | $ | 60,748 |
Denominator for basic earnings per share - weighted-average number of common shares outstanding during the period |  |  | 58,615 |  |  |  | 61,712 |  |  |  | 59,889 |  |  |  | 62,597 |
Incremental common shares attributable to exercise of outstanding dilutive options |  |  | 177 |  |  |  | 305 |  |  |  | 298 |  |  |  | 474 |
Incremental common shares attributable to outstanding restricted shares, restricted stock units and phantom stock |  |  | 87 |  |  |  | 86 |  |  |  | 204 |  |  |  | 91 |
Denominator for diluted earnings per share |  |  | 58,879 |  |  |  | 62,103 |  |  |  | 60,391 |  |  |  | 63,162 |
Basic earnings per share |  | $ | 0.34 |  |  | $ | 0.36 |  |  | $ | 0.82 |  |  | $ | 0.97 |
Diluted earnings per share |  | $ | 0.34 |  |  | $ | 0.36 |  |  | $ | 0.81 |  |  | $ | 0.96 |
Options to purchase 3.8 million and 3.5 million common shares for the three and nine months ended September 30, 2011, respectively, were not included in the computation of diluted earnings per share because the option exercise price was greater than the average market price of the common shares. Options to purchase 3.7 million and 2.9 million common shares for the three and nine months ended September 30, 2010, respectively, were not included in the computation of diluted earnings per share because the option exercise price was greater than the average market price of the common shares.

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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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