Earnings Per Share ("EPS") (Tables)

9 Months Ended

Jun. 26, 2016

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 26, 2016		June 28, 2015		June 26, 2016		June 28, 2015
	(in thousands, except per share data)
Net income attributable to Tetra Tech	$	25,694	$	26,206	$	52,678	70,798
Weighted-average common shares outstanding – basic	57,796		60,207		58,483		61,293
Effect of dilutive stock options and unvested restricted stock	820		585		745		594
Weighted-average common stock outstanding – diluted	58,616		60,792		59,228		61,887
Earnings per share attributable to Tetra Tech:
Basic	$	0.44	$	0.44	$	0.90	$	1.16
Diluted	$	0.44	$	0.43	$	0.89	$	1.14