XML 74 R33.htm IDEA: XBRL DOCUMENT v3.20.1
Earnings per Share ("EPS") (Tables)
 6 Months Ended
Mar. 29, 2020
Earnings Per Share [Abstract]  
Schedule of Number of Weighted-average Shares Used to Compute Basic and Diluted EPS
The following table presents the number of weighted-average shares used to compute basic and diluted EPS:

 Three Months EndedSix Months Ended
 March 29, 2020March 31, 2019March 29, 2020March 31, 2019
 (in thousands, except per share data)
Net income attributable to Tetra Tech$36,397  $55,911  $83,707  $97,907  
Weighted-average common shares outstanding – basic54,699  55,143  54,541  55,237  
Effect of dilutive stock options and unvested restricted stock764  842  839  924  
Weighted-average common shares outstanding – diluted55,463  55,985  55,380  56,161  
Earnings per share attributable to Tetra Tech:    
Basic$0.67  $1.01  $1.53  $1.77  
Diluted$0.66  $1.00  $1.51  $1.74