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Commitments and Contingencies - Additional Information (Detail) | Sep. 28, 2019 USD ($)
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Current Investments | Collateral Pledged [Member] |
Commitments and Contingencies Disclosure [Line Items] |
Investments providing collateral for letters of credit to guarantee insurance claims | $ 31,596,000
Non-Current Investments |
Commitments and Contingencies Disclosure [Line Items] |
Total non-current investments | 85,460,000
Non-Current Investments | Collateral Pledged [Member] |
Commitments and Contingencies Disclosure [Line Items] |
Investments providing collateral for letters of credit to guarantee insurance claims | 36,741,000
Revolving Credit Facility |
Commitments and Contingencies Disclosure [Line Items] |
Letters of credit outstanding | 34,368,000
Guarantee Payment of Insurance Claims |
Commitments and Contingencies Disclosure [Line Items] |
Letters of credit outstanding | $ 61,503,000

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