STOCK-BASED COMPENSATION AND STOCK OWNERSHIP PLANS (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
Oct. 02, 2020	Sep. 27, 2019	Sep. 28, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares paid for tax withholding (shares)	4,054	3,381
Award performance period	3 years
Discount from fair market value (not less than)	85.00%
Employee stock purchase plan, expense	$ 43	$ 27	$ 53
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Bonus achievement target level	80.00%
Bonus payout as a percentage of target award	50.00%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Bonus achievement target level	120.00%
Bonus payout as a percentage of target award	150.00%
Restricted Stock and Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Tax benefit	$ 238	646	369
Non-vested Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Tax benefit	$ 252	163	122
Award vesting period (years)	5 years
Fair value of vested restricted stock	$ 1,288	1,237	3,948
Stock compensation expense	1,032	667	501
Unrecognized compensation cost	1,176
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Tax benefit	166	405	424
Fair value of vested restricted stock	1,600	2,945	80
Stock compensation expense	1,611	$ 1,652	$ 1,743
Unrecognized compensation cost	$ 1,671
Shares tendered back to company (shares)	3,075	6,509
Restricted Stock Units (RSUs) \| Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (years)	1 year
Restricted Stock Units (RSUs) \| Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (years)	3 years
Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant under plan (shares)	536,657
Employee stock purchase plan, shares issued (shares)	2,190	1,594	3,365

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