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Earnings per Share | 9 Months Ended
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Jun. 30, 2011
Earnings Per Share [Abstract] |
Earnings per Share | Note D: Earnings per Share We compute basic earnings per share on the basis of the weighted average number of shares of common stock outstanding during the period. We compute diluted earnings per share on the basis of the weighted average number of shares of common stock plus the effect of dilutive potential common shares outstanding during the period using the treasury stock method. Dilutive potential common shares include outstanding stock options and restricted stock awards. Potential common shares are required to be excluded from the computation of diluted earnings per share if the assumed proceeds upon exercise or vest, as defined by FASB ASC 718-10-25, are greater than the cost to re-acquire the same number of shares at the average market price, and therefore the effect would be anti-dilutive. Components of basic and diluted earnings per share and excluded anti-dilutive potential common shares are as follows (in thousands except per share amounts):
|  | Three Months Ended |  |  | Nine Months Ended |
|  | June 30, |  |  | June 30, |
|  | 2011 |  |  | 2010 |  |  | 2011 |  |  | 2010 |
Net income (A) |  | $ | 26,527 |  |  | $ | 19,962 |  |  | $ | 85,794 |  |  | $ | 69,442 |
Weighted average outstanding shares of common stock (B) |  |  | 49,926 |  |  |  | 49,201 |  |  |  | 49,849 |  |  |  | 48,969 |
Dilutive effect of stock options and restricted stock |  |  | 459 |  |  |  | 439 |  |  |  | 443 |  |  |  | 572 |
Weighted average common stock and common stock equivalents (C) |  |  | 50,385 |  |  |  | 49,640 |  |  |  | 50,292 |  |  |  | 49,541 |
Basic earnings per share (A/B) |  | $ | 0.53 |  |  | $ | 0.41 |  |  | $ | 1.72 |  |  | $ | 1.42 |
Diluted earnings per share (A/C) |  | $ | 0.53 |  |  | $ | 0.40 |  |  | $ | 1.71 |  |  | $ | 1.40 |
Potential common shares excluded from the calculation of diluted earnings per share |  |  | — |  |  |  | 5 |  |  |  | 6 |  |  |  | 6 |

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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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