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Leases - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2021 | Mar. 28, 2020 | Mar. 31, 2021 | Mar. 28, 2020 | Sep. 30, 2020 | Feb. 28, 2019
Lessee Lease Description [Line Items] |  |  |  |  |  |
Payments to be received as sublease income |  |  |  |  |  | $ 9,100
Operating right-of-use lease assets | $ 148,684 |  | $ 148,684 |  | $ 149,933 |
Operating lease, liability | 206,384 |  | 206,384 |  |  |
Lease Cost |  |  |  |  |  |
Operating cash flows from operating leases | 14,016 | $ 9,642 | 28,076 | $ 15,140 |  |
Facility Closures and Related Costs |  |  |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |  |  |
Operating lease liability, net restructured facilities | 5,300 |  | 5,300 |  | $ 11,300 |
Operating right-of-use lease assets | 1,900 |  | 1,900 |  |  |
Operating lease, liability | 7,200 |  | 7,200 |  |  |
Lease Cost |  |  |  |  |  |
Operating cash flows from operating leases | 2,500 | $ 2,100 | 6,300 | $ 4,500 |  |
Facility Closures and Related Costs | Operating Lease Short Term Lease Obligation |  |  |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |  |  |
Operating lease, liability | 4,700 |  | 4,700 |  |  |
Facility Closures and Related Costs | Operating Lease Long Term Lease Obligation |  |  |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |  |  |
Operating lease, liability | 2,500 |  | 2,500 |  |  |
Sublease Income Committed |  |  |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |  |  |
Sublease income assumed | $ 1,900 |  | $ 1,900 |  |  |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977 + Details
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- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918643-209977 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(1) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980 + Details
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