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SHAREHOLDERS' EQUITY AND EMPLOYEE BENEFIT PLANS (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands, shares in Millions
3 Months Ended 12 Months Ended
Aug. 26, 2020
May 29, 2020
Feb. 20, 2020
Dec. 12, 2019
Aug. 07, 2019
Oct. 03, 2020
Jun. 27, 2020
Mar. 28, 2020
Dec. 28, 2019
Sep. 28, 2019
Jun. 29, 2019
Mar. 30, 2019
Oct. 03, 2020
Sep. 28, 2019
Sep. 29, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Dividends declared (in usd per share) $ 0.12 $ 0.12 $ 0.12 $ 0.12 $ 0.12 $ 0.12 $ 0.12 $ 0.12 $ 0.12 $ 0.12 $ 0.12 $ 0.12 $ 0.48 $ 0.48  
Description Of Maximum Percentage Of Employee Contributions and Matching Contributions Based Upon Years Of Service                         employee contributions and matching Company contributions from 4% to 6%    
Relative Total Shareholder Return Average Stock Price Calculation Period                         90 days    
Total Shareholder Return Award Performance Measurement Period                         3 years    
Proceeds from Stock Options Exercised                         $ 0 $ 14 $ 55
Minimum [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Defined Contribution Plan, Employer Matching Contribution, Percent                         4.00%    
Share Based Compensation Arrangement By Share Based Payment Award Vesting Percentage           0.00%             0.00%    
Maximum [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Defined Contribution Plan, Employer Matching Contribution, Percent                         6.00%    
Share Based Compensation Arrangement By Share Based Payment Award Vesting Percentage           200.00%             200.00%    
Equity Incentive Plan 2009 [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant           3.4             3.4    
Non Employee Director [Member]                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Grant of common shares, upon initial election to board, value                         $ 120    
Grant of common shares, upon initial election to board, quarterly, value                         $ 37