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STOCK-BASED COMPENSATION AND STOCK OWNERSHIP PLANS (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jun. 30, 2017
Jul. 01, 2016
Jun. 30, 2017
Jul. 01, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares available for grant 612,570,000   612,570,000  
Class A        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Employee stock purchase plan shares issued (shares) 0 7,732 0 7,732
Income in connection with Employee' Stock Purchase Plan $ (10)      
ESPP compensation expense   $ 33 $ 15 $ 33
Non-Vested Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares tendered for tax withholding (shares)     17,832,000 19,973,000
Stock-based compensation expense, net of forfeitures 219 332 $ 722 $ 1,013
Unrecognized stock-based compensation expense 952   952  
Fair value of vested restricted stock     3,219 2,349
Restricted Stock Units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense, net of forfeitures 213 $ 148 640 $ 415
Unrecognized stock-based compensation expense $ 1,162   $ 1,162  
Restricted Stock Units (RSUs) | Vesting Period 1        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period     1 year  
Restricted Stock Units (RSUs) | Vesting Period 2        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period     3 years  
Minimum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Employee stock purchase plan, purchase price     85.00%  
Minimum | Non-Vested Stock | Employees | Class A        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period     2 years  
Maximum | Non-Vested Stock | Employees | Class A        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period     5 years