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v3.10.0.1

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2018 | Oct. 01, 2017 | Oct. 02, 2016
Income Statement [Abstract] |  |  |
Revenue | $ 2,964,148 | $ 2,753,360 | $ 2,583,469
Subcontractor costs | (763,414) | (719,350) | (654,264)
Other costs of revenue | (1,816,276) | (1,680,372) | (1,598,994)
Gross profit | 384,458 | 353,638 | 330,211
Selling, general and administrative expenses | (190,120) | (177,219) | (171,985)
Acquisition and integration expenses | 0 | 0 | (19,548)
Contingent consideration – fair value adjustments | (4,252) | 6,923 | (2,823)
Income from operations | 190,086 | 183,342 | 135,855
Interest income | 1,824 | 729 | 996
Interest expense | (17,348) | (12,310) | (12,385)
Income before income tax expense | 174,562 | 171,761 | 124,466
Income tax expense | (37,605) | (53,844) | (40,613)
Net income | 136,957 | 117,917 | 83,853
Net income attributable to noncontrolling interests | (74) | (43) | (70)
Net income attributable to Tetra Tech | $ 136,883 | $ 117,874 | $ 83,783
Earnings per share attributable to Tetra Tech: |  |  |
Basic (in dollars per share) | $ 2.46 | $ 2.07 | $ 1.44
Diluted (in dollars per share) | $ 2.42 | $ 2.04 | $ 1.42
Weighted-average common shares outstanding: |  |  |
Basic (in shares) | 55,670 | 56,911 | 58,186
Diluted (in shares) | 56,598 | 57,913 | 58,966
Cash dividends paid per share (in dollars per share) | $ 0.44 | $ 0.38 | $ 0.34

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- Definition This element represents acquisition and integration -related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References No definition available. + Details
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- Definition The aggregate amount is comprised primarily of marketing and bid and proposal costs, and corporate headquarters' costs related to the executives offices, finance, accounting, administration and information technology, including non-contract related portion of stock-based compensation, depreciation of property and equipment and amortization of identifiable intangible assets. + References No definition available. + Details
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