Commitments and Contingencies - Narrative (Details) - USD ($) $ in Thousands	Dec. 27, 2019	Sep. 30, 2019
Loss Contingencies [Line Items]
Purchase obligations for rest of fiscal year	$ 211,046
Purchase obligations for year two	976
Total settlement for prior cap agreement deductible	13,000
Special Products Claims and Other Product Liabilities
Loss Contingencies [Line Items]
Product liability	2,577	$ 2,424
Special Products Claims and Other Product Liabilities | Minimum
Loss Contingencies [Line Items]
Probable losses	1,000
Special Products Claims and Other Product Liabilities | Maximum
Loss Contingencies [Line Items]
Probable losses	8,000
Special Products Claims
Loss Contingencies [Line Items]
Total settlement for cap agreement deductible	$ 12,000