ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Changes by Component) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 28, 2018	Dec. 29, 2017
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 279,197
Other comprehensive income (loss) before reclassifications	(1,700)	$ (276)
Amounts reclassified from accumulated other comprehensive income	138	183
Tax effects	(33)	(44)
Ending balance	279,567	241,946
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	3,487	4,993
Ending balance	1,892	4,856
Foreign Currency Translation Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	7,796	11,179
Other comprehensive income (loss) before reclassifications	(1,700)	(276)
Amounts reclassified from accumulated other comprehensive income	0	0
Tax effects	0	0
Ending balance	6,096	10,903
Unamortized Loss on Defined Benefit Pension Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(4,309)	(6,186)
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income	138	183
Tax effects	(33)	(44)
Ending balance	$ (4,204)	$ (6,047)