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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 |

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