The amount of expense provided in the period for legal costs incurred on or before the balance sheet date pertaining to resolved, pending or threatened litigation, including arbitration and mediation proceedings.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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Amount of judgment or settlement awarded to (against) the entity in respect of litigation.

+ References

No definition available.

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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.

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- Definition

Amount charged against operating income increasing loss contingency liability, after adjustments to reduce previously estimated charges.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

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The amount of loss pertaining to the specified contingency that was charged against earnings in the period, including the effects of revisions in previously reported estimates.

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- Definition

The total number of new claims filed pertaining to a loss contingency during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349

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Carrying amount 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 that are expected to be paid within one year (or the normal operating cycle, if longer).

+ References

No definition available.

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Commitments and Contingencies - Additional Information (Detail) $ in Thousands			3 Months Ended	12 Months Ended
	Dec. 09, 2016 USD ($)	Nov. 08, 2016 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 USD ($) Lawsuits	Jan. 02, 2016 USD ($)
Loss Contingencies [Line Items]
Self-insurance reserves, current liabilities			$ 28,000	$ 28,000	$ 23,900
Alleged complaints \| Lawsuits				26
Settlement funds			$ 9,250
Class and / or Collective action treatment
Loss Contingencies [Line Items]
Alleged complaints \| Lawsuits				19
Individual claims and do not seek class or collective action treatment
Loss Contingencies [Line Items]
Alleged complaints \| Lawsuits				12
North Carolina Class Action
Loss Contingencies [Line Items]
Legal settlement	$ 9,000
Settlement funds	(5,200)
Attorney's fee	$ 3,800
Connecticut Class Action
Loss Contingencies [Line Items]
Litigation settlement amount including attorney's fees		$ 1,250