Derivative Instruments and Hedging Activities (Pretax Amounts Recognized in Accumulated Other Comprehensive Income on Currency Contracts) (Details) - USD ($) $ in Thousands	3 Months Ended
Dec. 28, 2019	Dec. 29, 2018
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Net (gain) loss reclassified into revenue	$ (250)	$ (914)
Net gain (loss) recognized in OCI	(114)	(1,416)
Currency exchange contracts gain (loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning unrealized net gain (loss) in AOCI	566	672
Net (gain) loss reclassified into revenue	(19)	(585)
Net gain (loss) recognized in OCI	(150)	127
Ending unrealized net gain (loss) in AOCI	397	214
Interest rate swap
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning unrealized net gain (loss) in AOCI	1,079	7,411
Net (gain) loss reclassified into revenue	(301)	(584)
Net gain (loss) recognized in OCI	0	(1,938)
Ending unrealized net gain (loss) in AOCI	$ 778	$ 4,889

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

No definition available.

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- Definition

Amount, after tax, of accumulated gain (loss) on derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e637-108580

+ Details

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- Definition

Amount, after tax and before reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e637-108580

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- Definition

Amount, after tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e689-108580

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e637-108580

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