Earnings Per Share ("EPS") (Tables)

6 Months Ended

Apr. 02, 2017

Earnings Per Share ("EPS")

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

	Three Months Ended				Six Months Ended
	April 2, 2017		March 27, 2016		April 2, 2017		March 27, 2016
	(in thousands, except per share data)
Net income attributable to Tetra Tech	$	26,862	$	3,744	$	53,424	26,983
Weighted-average common shares outstanding – basic	57,270		58,451		57,171		58,819
Effect of dilutive stock options and unvested restricted
stock	1,000		680		1,023		708
Weighted-average common stock outstanding – diluted	58,270		59,131		58,194		59,527
Earnings per share attributable to Tetra Tech:
Basic	$	0.47	$	0.06	$	0.93	$	0.46
Diluted	$	0.46	$	0.06	$	0.92	$	0.45