ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Changes by Component) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Mar. 29, 2019	Mar. 30, 2018	Mar. 29, 2019	Mar. 30, 2018
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period			$ 279,197
Other comprehensive income (loss) before reclassifications	$ (148)	$ 505	(1,848)	$ 229
Amounts reclassified from accumulated other comprehensive income	138	(2,169)	276	(1,986)
Tax effects	(33)	(44)	(66)	(88)
Balance, end of period	300,701	261,245	300,701	261,245
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	1,892	4,856	3,487	4,993
Balance, end of period	1,849	3,148	1,849	3,148
Foreign Currency Translation Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	6,096	10,903	7,796	11,179
Other comprehensive income (loss) before reclassifications	(148)	505	(1,848)	229
Amounts reclassified from accumulated other comprehensive income	0	(2,351)	0	(2,351)
Tax effects	0	0	0	0
Balance, end of period	5,948	9,057	5,948	9,057
Unamortized Loss on Defined Benefit Pension Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(4,204)	(6,047)	(4,309)	(6,186)
Other comprehensive income (loss) before reclassifications	0	0	0	0
Amounts reclassified from accumulated other comprehensive income	138	182	276	365
Tax effects	(33)	(44)	(66)	(88)
Balance, end of period	$ (4,099)	$ (5,909)	$ (4,099)	$ (5,909)

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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

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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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