Earnings Per Share ("EPS") (Tables)

9 Months Ended

Jun. 28, 2015

Earnings Per Share ("EPS")

Schedule of number of weighted-average shares used to compute basic and diluted EPS

	Three Months Ended				Nine Months Ended
	June 28, 2015		June 29, 2014		June 28, 2015		June 29, 2014
	(in thousands, except per share data)
Net income attributable to Tetra Tech	$	26,206	$	26,657	$	70,798	$	85,680
Weighted-average common shares outstanding – basic	60,207		64,566		61,293		64,683
Effect of dilutive stock options and unvested restricted stock	585		736		594		810
Weighted-average common stock outstanding – diluted	60,792		65,302		61,887		65,493
Earnings per share attributable to Tetra Tech:
Basic	$	0.44	$	0.41	$	1.16	$	1.32
Diluted	$	0.43	$	0.41	$	1.14	$	1.31