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EMPLOYEE BENEFITS (Pension Plan Assets Measured At Fair Value) (Details) - USD ($)
$ in Thousands
Sep. 27, 2019
Sep. 28, 2018
Sep. 29, 2017
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets measured at fair value $ 30,356 $ 25,971 $ 20,802
Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets measured at fair value 5,370 5,601  
Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets measured at fair value 24,955 20,318  
Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets measured at fair value 31 52 $ 80
Fixed income securities      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets measured at fair value 28,619 24,260  
Fixed income securities | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets measured at fair value 4,066 4,273  
Fixed income securities | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets measured at fair value 24,553 19,987  
Fixed income securities | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets measured at fair value 0 0  
Mutual funds      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets measured at fair value 1,304 1,328  
Mutual funds | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets measured at fair value 1,304 1,328  
Mutual funds | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets measured at fair value 0 0  
Mutual funds | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets measured at fair value 0 0  
Money market funds      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets measured at fair value 402 331  
Money market funds | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets measured at fair value 0 0  
Money market funds | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets measured at fair value 402 331  
Money market funds | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets measured at fair value 0 0  
Group annuity contract      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets measured at fair value 31 52  
Group annuity contract | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets measured at fair value 0 0  
Group annuity contract | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets measured at fair value 0 0  
Group annuity contract | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets measured at fair value $ 31 $ 52