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) - $ / shares
12 Months Ended
Sep. 30, 2017
Oct. 01, 2016
Oct. 03, 2015
Number of Units      
Units forfeited (shares)     (5,200)
Restricted Stock Units and Performance Stock Units | 2010 Stock Plan      
Number of Units      
Units outstanding, beginning of fiscal year (shares) 585,638 518,800 215,352
Units granted (shares) 126,000 159,138 524,000
Units issued (shares) (64,846) (49,529) (69,657)
Units forfeited (shares) (133,936) (42,771) (150,895)
Units outstanding, end of fiscal year (shares) 512,856 585,638 518,800
Weighted average grant date fair value      
Units outstanding, beginning of fiscal year (usd per share) $ 11.54 $ 10.80 $ 14.31
Units granted (usd per share) 17.97 14.03 10.81
Units issued (usd per share) 11.14 12.32 14.31
Units forfeited (usd per share) 12.02 10.87 14.26
Units outstanding, end of fiscal year (usd per share) $ 13.09 $ 11.54 $ 10.80