SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Schedule Of Property, Plant And Equipment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 27, 2019	Sep. 28, 2018
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 202,527	$ 187,256
Less accumulated depreciation	143,028	131,322
Property, plant and equipment, net of accumulated depreciation	59,499	55,934
Property improvements
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 588	590
Property improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Property improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	20 years
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 23,231	21,669
Buildings and improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	20 years
Buildings and improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	40 years
Furniture and fixtures, equipment and computer software
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 178,708	$ 164,997
Furniture and fixtures, equipment and computer software | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Furniture and fixtures, equipment and computer software | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years