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Earnings per Share ("EPS") | 3 Months Ended
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Jan. 01, 2023
Earnings Per Share [Abstract] |
Earnings per Share ("EPS") | Earnings per Share (“EPS”) Basic EPS is computed by dividing net income available to common stockholders by the weighted-average number of common shares outstanding, less unvested restricted stock for the period. Diluted EPS is computed by dividing net income by the weighted-average number of common shares outstanding and dilutive potential common shares for the period. Potential common shares include the weighted-average dilutive effects of outstanding stock options and unvested restricted stock using the treasury stock method. The following table presents the number of weighted-average shares used to compute basic and diluted EPS (in thousands, except per share data):
| Three Months Ended |  |
| January 1, 2023 |  | January 2, 2022 |  |  |  |
Net income attributable to Tetra Tech | $ | 116,706 |  |  | $ | 68,489 |  |  |  |  |
Weighted-average common shares outstanding – basic | 53,069 |  |  | 53,937 |  |  |  |  |
Effect of dilutive stock options and unvested restricted stock | 460 |  |  | 640 |  |  |  |  |
Weighted-average common shares outstanding – diluted | 53,529 |  |  | 54,577 |  |  |  |  |
Earnings per share attributable to Tetra Tech: |  |  |  |  |  |  |
Basic | $ | 2.20 |  |  | $ | 1.27 |  |  |  |  |
Diluted | $ | 2.18 |  |  | $ | 1.25 |  |  |  |  |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI https://asc.fasb.org/topic&trid=2144383 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3630-109257 + Details
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