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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jul. 03, 2022 | Jun. 27, 2021 | Jul. 03, 2022 | Jun. 27, 2021
Statement of Comprehensive Income [Abstract] |  |  |  |
Net income | $ 58,657 | $ 51,924 | $ 180,205 | $ 149,900
Other comprehensive income, net of tax |  |  |  |
Foreign currency translation adjustment, net of tax | (44,884) | 11,159 | (42,763) | 54,527
Gain on cash flow hedge valuations, net of tax | 2,380 | 1,498 | 9,984 | 4,864
Other comprehensive income (loss), net of tax | (42,504) | 12,657 | (32,779) | 59,391
Comprehensive income, net of tax | 16,153 | 64,581 | 147,426 | 209,291
Comprehensive income attributable to noncontrolling interests, net of tax | 6 | 23 | 25 | 50
Comprehensive income attributable to Tetra Tech, net of tax | $ 16,147 | $ 64,558 | $ 147,401 | $ 209,241

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