XML 55 R39.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Earnings Per Share (Tables) | 12 Months Ended
--- | ---
Oct. 01, 2017
Earnings Per Share [Abstract] |
Schedule of number of weighted-average shares used to compute basic and diluted EPS | The following table sets forth the number of weighted-average shares used to compute basic and diluted EPS:
| Fiscal Year Ended
| October 1, 2017 |  | October 2, 2016 |  | September 27, 2015
| (in thousands, except per share data)
Net income attributable to Tetra Tech | $ | 117,874 |  |  | $ | 83,783 |  |  | $ | 39,074 |
Weighted-average common shares outstanding – basic | 56,911 |  |  | 58,186 |  |  | 60,913 |
Effect of diluted stock options and unvested restricted stock | 1,002 |  |  | 780 |  |  | 619 |
Weighted-average common stock outstanding – diluted | 57,913 |  |  | 58,966 |  |  | 61,532 |
Earnings per share attributable to Tetra Tech: |  |  |  |  |  |  |  |
Basic | $ | 2.07 |  |  | $ | 1.44 |  |  | $ | 0.64 |
Diluted | $ | 2.04 |  |  | $ | 1.42 |  |  | $ | 0.64 |

X
- References No definition available. + Details
Name: | us-gaap_EarningsPerShareAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
Name: | us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration