Segment Information - Net Sales by Geography (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Mar. 27, 2020	Mar. 29, 2019	Mar. 27, 2020	Mar. 29, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 455,654	$ 469,309	$ 903,102	$ 921,337
United States
Disaggregation of Revenue [Line Items]
Net sales	401,055	408,007	797,195	803,635
Other Americas
Disaggregation of Revenue [Line Items]
Net sales	7,655	8,977	14,242	18,209
Europe
Disaggregation of Revenue [Line Items]
Net sales	37,241	38,808	69,327	72,670
Asia-Pacific
Disaggregation of Revenue [Line Items]
Net sales	$ 9,703	$ 13,517	$ 22,338	$ 26,823

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration