Annual report pursuant to Section 13 and 15(d)

Earnings Per Share - Additional Information (Detail)

v3.8.0.1
Earnings Per Share - Additional Information (Detail) - shares
shares in Thousands
12 Months Ended
Sep. 30, 2017
Sep. 26, 2015
Stock Options    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Common stock outstanding, not included in computation of diluted earnings per share (in shares) 31 3,200