Annual report pursuant to Section 13 and 15(d)

Stock-based Compensation (Narrative) (Details)

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Stock-based Compensation (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2017
Sep. 27, 2014
Jul. 01, 2017
Sep. 30, 2017
Oct. 01, 2016
Oct. 03, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Compensation expense recorded       $ 2.3 $ 2.0 $ 1.9
Tax benefits associated with compensation costs       0.9 0.8 $ 0.7
Equity instruments forfeited (shares)           5,200
Vested in period, fair value           $ 1.0
Unrecognized compensation cost related to non-vested awards       2.8    
Intrinsic value of options exercised       $ 1.0 $ 0.3  
Restricted Stock Units (RSUs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Awards granted in the period (shares)       83,788    
Equity instruments, vested in period (shares)       8,438    
Equity instruments granted in the period (shares)       355,000    
Equity instruments forfeited (shares)           12,019
Performance Stock Units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Awards granted in the period (shares)       75,350    
Equity instruments granted in the period (shares)           169,000
Performance Awards            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Awards granted in the period (shares)     126,000      
Equity instruments, vested in period (shares)       53,248    
Equity instruments forfeited (shares)           133,676
One year vesting period            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Equity instruments granted in the period (shares)         52,000  
Two year vesting period            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Equity instruments granted in the period (shares)       52,000    
2010 Stock Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Aggregate number of shares that may be delivered       500,000    
Equity instruments granted in the period (shares)       0 0 0
2010 Stock Plan | Restricted Stock Units and Performance Stock Units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Awards granted in the period (shares)       126,000 159,138 524,000
Equity instruments forfeited (shares)       133,936 42,771 150,895
2010 Stock Plan | One year vesting period            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Unrecognized compensation cost related to non-vested awards (period of recognition)   3 years 2 months 12 days        
Option Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Tax benefit realized from exercise of stock options       $ 0.1   $ 0.7
Management | Option Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Aggregate number of shares that may be delivered       2,000,000    
Exercise term, from dates of grant       10 years    
Management | Option Plan | Minimum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting period       3 years    
Management | Option Plan | Maximum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting period       4 years    
Vest Upon Filing of 10-K for the Year Ending September 29, 2018 [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Equity instruments, vested in period (shares)     42,000      
Upon Filing of Annual Report in 2016 | Restricted Stock Units (RSUs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Awards granted in the period (shares)       8,438    
Upon Filing of Annual Report in 2016 | Performance Stock Units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Equity instruments granted in the period (shares)         53,248 65,000
Upon Filing of Annual Report in 2017 | Restricted Stock Units (RSUs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Awards granted in the period (shares)       75,350    
Upon Filing of Annual Quarterly Report for the Period Ending June Twenty Seven Twenty Fifteen | Restricted Stock Units (RSUs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Equity instruments granted in the period (shares)           69,657
Upon Filing of Annual Quarterly Report for the Period Ending June Twenty Seven Twenty Fifteen | Performance Stock Units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Equity instruments granted in the period (shares)       49,529    
Vest Upon Filing of 10-K for the Year Ending September 28, 2019            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Equity instruments, vested in period (shares)     42,000      
Vest Upon Filing of 10-K for the Year Ending October 3, 2020            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Equity instruments, vested in period (shares)     42,000      
Junkfood | Discontinued Operations, Disposed of by Sale | Restricted Stock Units and Performance Stock Units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Accelerated compensation cost $ 0.3          
Junkfood | Discontinued Operations, Disposed of by Sale | Restricted Stock Units (RSUs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Equity instruments, vested in period (shares)     45,000      
Stock issued during the period (shares)     42,500      
Stock vested, paid in cash, number of shares (shares)     2,500      
Junkfood | Discontinued Operations, Disposed of by Sale | Performance Awards            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Equity instruments, vested in period (shares)     5,000