Earnings Per Share ("EPS") (Tables)

3 Months Ended

Dec. 28, 2014

Earnings Per Share ("EPS")

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

	Three Months Ended
	December 28, 2014		December 29, 2013
	(in thousands, except per share data)
Net income attributable to Tetra Tech	$	25,575	$	27,315
Weighted-average common shares outstanding - basic	62,452		64,227
Effect of dilutive stock options and unvested restricted stock	660		821
Weighted-average common stock outstanding - diluted	63,112		65,048
Earnings per share attributable to Tetra Tech:
Basic	$	0.41	$	0.43
Diluted	$	0.41	$	0.42