Annual report pursuant to Section 13 and 15(d)

Stock-based Compensation (Summary of Nonvested Options) (Details)

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Stock-based Compensation (Summary of Nonvested Options) (Details) - Restricted Stock Units and Performance Stock Units - 2010 Stock Plan - $ / shares
12 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Number of Units    
Units outstanding, beginning of fiscal year (shares) 512,856 585,638
Units granted (shares) 205,500 126,000
Units issued (shares) (146,781) (64,846)
Units forfeited (shares) (39,075) (133,936)
Units outstanding, end of fiscal year (shares) 532,500 512,856
Weighted average grant date fair value    
Units outstanding, beginning of fiscal year (usd per share) $ 13.09 $ 11.54
Units granted (usd per share) 20.57 17.97
Units issued (usd per share) 12.89 11.14
Units forfeited (usd per share) 11.88 12.02
Units outstanding, end of fiscal year (usd per share) $ 16.12 $ 13.09