Liability recorded for such group health insurance reserves.

No definition available.

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- Definition

Loss for which catastrophic coverage has been purchased from third party insurers.

+ References

No definition available.

+ Details

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Namespace Prefix:	hlm_
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- Definition

Maximum amount of self insurance coverage.

+ References

No definition available.

+ Details

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- Definition

Maximum annual stop loss limit for each participant.

+ References

No definition available.

+ Details

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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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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

Amount of loss contingency liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349

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- Definition

Amount of increase (decrease) in loss contingency liability.

+ References

+ Details

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- Definition

Number of another entity's patents that the entity was found not to have infringed.

+ References

No definition available.

+ Details

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- Definition

Carrying amount (including both current and noncurrent portions) of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.24)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Commitments and Contingencies - Additional Information (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018 USD ($) patent	Sep. 30, 2017 USD ($)	Sep. 29, 2018 USD ($)	Sep. 30, 2017 USD ($)	Dec. 30, 2017 USD ($)
Loss Contingencies [Line Items]
Losses up to per occurrence related to product liability, automotive, workers' compensation and general liability	$ 250		$ 250
Liability recorded for such risk insurance reserves	2,107		2,107
Letters of Credit Outstanding, Amount	6,936		6,936
Group health claims up to annual stop loss limit per participant	250		250
Liability recorded for such group health insurance reserves	1,814		1,814
Loss Contingency, Loss in Period	$ 0	$ 4,128	(4,128)	$ 6,274
Patent Infringement from Minute Key Inc. [Member]
Loss Contingencies [Line Items]
Number of patents found not infringed \| patent	2
Maximum [Member]
Loss Contingencies [Line Items]
Occurrences in excess for purchased catastrophic coverage	$ 40,000
Minimum [Member]
Loss Contingencies [Line Items]
Occurrences in excess for purchased catastrophic coverage	250
Anti-dumping duties [Domain]
Loss Contingencies [Line Items]
Loss Contingency Accrual	$ 2,146		$ 2,146		$ 6,274