Segment Information - Net Sales by Geography (Details) - USD ($) $ in Thousands	3 Months Ended
Dec. 27, 2019	Dec. 28, 2018
Disaggregation of Revenue [Line Items]
Net sales	$ 447,448	$ 452,028
United States
Disaggregation of Revenue [Line Items]
Net sales	396,141	395,628
Other Americas
Disaggregation of Revenue [Line Items]
Net sales	6,586	9,232
Europe
Disaggregation of Revenue [Line Items]
Net sales	33,309	33,862
Asia-Pacific
Disaggregation of Revenue [Line Items]
Net sales	$ 11,412	$ 13,306

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

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