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Commitments and Contingencies - Additional Information (Detail) |  |  |  |  |  |  |  |  | 9 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 12, 2018 USD ($) | Sep. 10, 2018 USD ($) | Sep. 07, 2018 USD ($) | Sep. 05, 2018 USD ($) | Mar. 23, 2018 USD ($) | Jun. 30, 2017 USD ($) | Apr. 10, 2017 USD ($) | Mar. 13, 2017 USD ($) | Oct. 06, 2018 USD ($) Lawsuits | Dec. 30, 2017 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Self-insurance reserves, current liabilities |  |  |  |  |  |  |  |  | $ 35,800,000 | $ 30,100,000
Alleged complaints | Lawsuits |  |  |  |  |  |  |  |  | 27 |
Class and / or Collective action treatment |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Alleged complaints | Lawsuits |  |  |  |  |  |  |  |  | 23 |
Individual claims and do not seek class or collective action treatment |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Alleged complaints | Lawsuits |  |  |  |  |  |  |  |  | 4 |
Plaintiffs’ motions for class certification |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Alleged complaints | Lawsuits |  |  |  |  |  |  |  |  | 13 |
Long - Tennessee |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Legal settlement |  |  | $ 9,000,000 |  |  |  |  |  |  |
Lawsuit filing date |  |  |  |  |  |  |  |  | 4/20/2017 |
Long - Tennessee | Settlement Funds |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Legal settlement |  |  | 5,400,000 |  |  |  |  |  |  |
Long - Tennessee | Attorneys Fees |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Legal settlement |  |  | $ 3,600,000 |  |  |  |  |  |  |
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 |
McCurley - Carolina |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Legal settlement |  | $ 1,500,000 |  |  |  |  |  |  |  |
Lawsuit filing date |  |  |  |  |  |  |  |  | 1/20/2016 |
McCurley - Carolina | Settlement Funds |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Legal settlement |  | 800,000 |  |  |  |  |  |  |  |
McCurley - Carolina | Attorneys Fees |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Legal settlement |  | 600,000 |  |  |  |  |  |  |  |
McCurley - Carolina | Incentive Payments |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Legal settlement |  | $ 100,000 |  |  |  |  |  |  |  |
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] |  |  |  |  |  |  |  |  |  |
Legal settlement | $ 740,700 |  |  |  |  |  |  |  |  |
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 |
Medrano - Mexico |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Lawsuit filing date |  |  |  |  |  |  |  |  | 4/27/2016 |
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 |
Robbins - Mississippi |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Lawsuit filing date |  |  |  |  |  |  |  |  | 7/31/2017 |
Schucker - New York |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Legal settlement |  |  |  | $ 1,300,000 |  |  |  |  |  |
Lawsuit filing date |  |  |  |  |  |  |  |  | 5/9/2016 |
Schucker - New York | Settlement Funds |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Legal settlement |  |  |  | 400,000 |  |  |  |  |  |
Schucker - New York | Attorneys Fees |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Legal settlement |  |  |  | 900,000 |  |  |  |  |  |
Schucker - New York | Incentive Payments |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Legal settlement |  |  |  | $ 100,000 |  |  |  |  |  |

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