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Commitments and Contingencies - Additional Information (Detail) |  | 9 Months Ended |
--- | --- | --- | ---
Sep. 24, 2018 USD ($) | Sep. 30, 2018 USD ($) Settlement | Mar. 31, 2016 USD ($)
Commitments And Contingencies [Line Items] |  |  |
Accrued liabilities for environmental matters |  | $ 307,000 |
Penalty imposed to resolve outstanding permit violations | $ 124,000 |  |
Consent administrative order term | 30 days |  |
Estimated litigation liability |  | $ 18,450,000 |
Percentage of payment of investigation costs agreed by Hallowell Facility |  | 50.00% |
Insurance coverage of general liability and auto liability risks |  | $ 100,000,000 |
Product liability deductible per claim |  | $ 250,000 |
Confidential settlement agreement with family groups | Settlement |  | 3 |
Liability reserve |  | $ 0 |
Global Industrial Inc [Member] |  |  |
Commitments And Contingencies [Line Items] |  |  |
Estimated litigation liability |  |  | $ 0
Global Industrial Inc [Member] | Leidos Constructors, LLC [Member] | Accounts Payable [Member] |  |  |
Commitments And Contingencies [Line Items] |  |  |
Claim amount not approved for payment |  |  | $ 3,500,000

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