ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Changes by Component) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2017	Jul. 01, 2016	Jun. 30, 2017	Jul. 01, 2016
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			$ 207,496
Other comprehensive income (loss) before reclassifications	$ 2,350	$ (873)	(523)	$ 398
Amounts reclassified from accumulated other comprehensive income	265	114	548	425
Tax effects	(100)	(44)	(208)	(162)
Ending balance	239,924	213,099	239,924	213,099
Foreign Currency Translation Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	7,652	11,524	10,525	10,253
Other comprehensive income (loss) before reclassifications	2,350	(873)	(523)	398
Amounts reclassified from accumulated other comprehensive income	0	0	0	0
Tax effects	0	0	0	0
Ending balance	10,002	10,651	10,002	10,651
Unamortized Loss on Defined Benefit Pension Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(7,996)	(6,423)	(8,171)	(6,616)
Other comprehensive income (loss) before reclassifications	0	0	0	0
Amounts reclassified from accumulated other comprehensive income	265	114	548	425
Tax effects	(100)	(44)	(208)	(162)
Ending balance	(7,831)	(6,353)	(7,831)	(6,353)
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(344)	5,101	2,354	3,637
Ending balance	$ 2,171	$ 4,298	$ 2,171	$ 4,298