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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Changes by Component) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2021	Jan. 01, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	$ 458,505
Other comprehensive loss before reclassifications	(423)	$ 2,442
Amounts reclassified from accumulated other comprehensive income	21	135
Tax effects	(5)	(34)
Balance, end of period	466,613	398,612
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	7,386	4,717
Balance, end of period	6,979	7,260
Foreign Currency Translation Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	7,606	7,323
Other comprehensive loss before reclassifications	(423)	2,442
Amounts reclassified from accumulated other comprehensive income	0	0
Tax effects	0	0
Balance, end of period	7,183	9,765
Unamortized Loss on Defined Benefit Pension Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(220)	(2,606)
Other comprehensive loss before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income	21	135
Tax effects	(5)	(34)
Balance, end of period	$ (204)	$ (2,505)

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Amount before tax and reclassification adjustments of other comprehensive income (loss) attributable to parent.

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Amount of tax expense (benefit) allocated to other comprehensive income (loss) attributable to parent entity.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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