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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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Commitments and contingencies.

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Consent administrative order term.

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Insurance coverage of general liability and auto liability risks.

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Liability reserve.

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Number of settlement agreements.

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Penalty imposed to resolve outstanding permit violations.

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Product liability deductible per claim.

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Related party commitment obligation percentage.

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Total costs accrued as of the balance sheet date for environmental loss contingencies.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs.

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