v3.4.0.3
Share-Based Compensation - Summary of Restricted Stock, Restricted Stock Unit and Performance-based Restricted Stock Unit Activity (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
6 Months Ended
Apr. 01, 2016
Oct. 02, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Number of RSA, RSUs and PRSUs - beginning balance 1,692  
Number of RSA, RSUs and PRSUs, Granted 624  
Number of RSA, RSUs and PRSUs, Vested and released (454)  
Number of RSA, RSUs and PRSUs, Forfeited, canceled or expired (23)  
Number of RSA, RSUs and PRSUs - ending balance 1,839  
Weighted-Average Grant Date Fair Value - beginning balance $ 25.30  
Weighted-Average Grant Date Fair Value, Granted 40.72  
Weighted-Average Grant Date Fair Value, Vested and released 23.52  
Weighted-Average Grant Date Fair Value, Forfeited, canceled or expired 26.95  
Weighted-Average Grant Date Fair Value - ending balance $ 30.95  
Aggregate Intrinsic Value $ 81,876 $ 48,375