Commitments and Contingencies - Additional Information (Detail)							6 Months Ended
	Mar. 23, 2018 USD ($)	Feb. 14, 2018 USD ($)	Dec. 07, 2017 USD ($)	Jun. 30, 2017 USD ($)	Apr. 10, 2017 USD ($)	Mar. 13, 2017 USD ($)	Jul. 14, 2018 USD ($) Lawsuits	Dec. 30, 2017 USD ($)
Loss Contingencies [Line Items]
Self-insurance reserves, current liabilities							$ 31,700,000	$ 30,100,000
Alleged complaints | Lawsuits							33
Settlement Funds
Loss Contingencies [Line Items]
Legal settlement		$ 400,000	$ 800,000
Attorneys Fees
Loss Contingencies [Line Items]
Legal settlement		900,000	600,000
Incentive Payments
Loss Contingencies [Line Items]
Legal settlement		100,000	100,000
Class and / or Collective action treatment
Loss Contingencies [Line Items]
Alleged complaints | Lawsuits							25
Individual claims and do not seek class or collective action treatment
Loss Contingencies [Line Items]
Alleged complaints | Lawsuits							8
Plaintiffs’ motions for class certification
Loss Contingencies [Line Items]
Alleged complaints | Lawsuits							18
McCurley - Carolina
Loss Contingencies [Line Items]
Legal settlement			$ 1,500,000
Lawsuit filing date							1/20/2016
Schucker - New York
Loss Contingencies [Line Items]
Legal settlement		$ 1,300,000
Lawsuit filing date							5/9/2016
North Carolina Class Action
Loss Contingencies [Line Items]
Legal settlement				$ 9,000,000
Lawsuit filing date							9/12/2012
North Carolina Class Action | Settlement Funds
Loss Contingencies [Line Items]
Legal settlement				5,200,000
North Carolina Class Action | Attorneys Fees
Loss Contingencies [Line Items]
Legal settlement				$ 3,800,000
Connecticut Class Action
Loss Contingencies [Line Items]
Legal settlement						$ 1,250,000
Lawsuit filing date							1/6/2015
Tennessee Class Action
Loss Contingencies [Line Items]
Legal settlement					$ 250,000
Lawsuit filing date							7/2/2015
Preliminary Approval of Class Action | Coyle - Arizona
Loss Contingencies [Line Items]
Legal settlement	$ 4,300,000
Lawsuit filing date							7/20/2015
Preliminary Approval of Class Action | Settlement Funds
Loss Contingencies [Line Items]
Legal settlement	1,200,000
Preliminary Approval of Class Action | Attorneys Fees
Loss Contingencies [Line Items]
Legal settlement	2,900,000
Preliminary Approval of Class Action | Incentive Payments
Loss Contingencies [Line Items]
Legal settlement	$ 200,000
Rosinbaum - NorthCarolina
Loss Contingencies [Line Items]
Lawsuit filing date							12/1/2015
Neff - Vermont
Loss Contingencies [Line Items]
Lawsuit filing date							12/2/2015
Noll - Maine
Loss Contingencies [Line Items]
Lawsuit filing date							12/3/2015
Zapata - Texas
Loss Contingencies [Line Items]
Lawsuit filing date							3/14/2016
Rodriguez - Texas
Loss Contingencies [Line Items]
Lawsuit filing date							1/28/2016
Richard - Louisiana
Loss Contingencies [Line Items]
Lawsuit filing date							10/21/2015
Carr - Pennsylvania
Loss Contingencies [Line Items]
Lawsuit filing date							12/1/2015
Boulange Pennsylvania
Loss Contingencies [Line Items]
Lawsuit filing date							3/25/2016
Soares - California
Loss Contingencies [Line Items]
Lawsuit filing date							10/26/2015
Medrano - Mexico
Loss Contingencies [Line Items]
Lawsuit filing date							4/27/2016
Long - Tennessee
Loss Contingencies [Line Items]
Lawsuit filing date							4/20/2017
Wiatrek Texas
Loss Contingencies [Line Items]
Lawsuit filing date							8/15/2017
Martins Florida
Loss Contingencies [Line Items]
Lawsuit filing date							11/8/2016
Bryant - Texas
Loss Contingencies [Line Items]
Lawsuit filing date							10/9/2017
Green - Alabama
Loss Contingencies [Line Items]
Lawsuit filing date							5/11/2017
Hall - Alabama
Loss Contingencies [Line Items]
Lawsuit filing date							6/5/2017