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Employer Contributions (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
IAM National Pension Fund
Defined Benefit Plan Disclosure [Line Items]
EIN		516031295
Pension Plan No.		002
Pension Protection Act Zone Status		Green
FIP/RP Status Pending/ Implemented		No
Contributions		$ 108	$ 139	$ 121
Surcharge Imposed		No
Expiration Date of Collective Bargaining Agreement		Apr. 30, 2021
Retail Wholesale And Department Store International Union And Industry Pension Fund
Defined Benefit Plan Disclosure [Line Items]
EIN		630708442
Pension Plan No.		001
Pension Protection Act Zone Status		Red
FIP/RP Status Pending/ Implemented		Implemented
Contributions		$ 159	157	156
Surcharge Imposed		No
Expiration Date of Collective Bargaining Agreement		Aug. 14, 2021
Western Conference Of Teamsters Pension Trust
Defined Benefit Plan Disclosure [Line Items]
EIN	[1]	916145047
Pension Plan No.	[1]	001
Pension Protection Act Zone Status	[1]	Green
FIP/RP Status Pending/ Implemented	[1]	No
Contributions	[1]	$ 293	276	233
Surcharge Imposed	[1]	No
Expiration Date of Collective Bargaining Agreement	[1]	Feb. 04, 2022
BC&T International Pension Fund
Defined Benefit Plan Disclosure [Line Items]
EIN	[1]	526118572
Pension Plan No.	[1]	001
FIP/RP Status Pending/ Implemented	[1]	Implemented
Contributions	[1]	$ 220	$ 965	$ 1,194
Surcharge Imposed	[1]	Yes
Expiration Date of Collective Bargaining Agreement	[1]	Oct. 25, 2020
[1] The union employees withdrew from the fund effective November 1, 2017. The collective bargaining agreement is still in effect.

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The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.

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Amount of contributions made to multiemployer plan by employer.

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Three digit plan number for a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers.

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Indicate the multiemployer plan's certified zone status as currently required by the Pension Protection Act of 2006 or a subsequent amendment thereof. The zone status categories are red (critical status), orange (seriously endangered), yellow (endangered), and green (none of the above). The acceptable values are "red", "orange", "yellow", "green", "other", and "NA". A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers.

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