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Commitments and Contingencies - Additional Information (Detail) |  |  |  |  |  | 1 Months Ended | 6 Months Ended
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Sep. 12, 2018 USD ($) | Sep. 10, 2018 USD ($) | Sep. 07, 2018 USD ($) | Sep. 05, 2018 USD ($) | Mar. 23, 2018 USD ($) | Jun. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) | Jul. 13, 2019 USD ($) Lawsuits
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Alleged complaints | Lawsuits |  |  |  |  |  |  |  | 15
Legal settlement |  |  | $ 9,000,000.0 |  |  |  |  |
Legal settlement, amount paid |  |  |  |  |  | $ 3,500,000 | $ 4,200,000 |
Remainder of legal settlement funds |  |  | 1,300,000 |  |  |  |  |
Legal settlement |  |  | 21,000,000.0 |  |  |  |  | $ 21,000,000
Settlement Funds |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Legal settlement |  |  | 5,400,000 |  |  |  |  |
Attorneys Fees |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Legal settlement |  |  | $ 3,600,000 |  |  |  |  |
Class and / or Collective action treatment |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Alleged complaints | Lawsuits |  |  |  |  |  |  |  | 12
Individual claims and do not seek class or collective action treatment |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Alleged complaints | Lawsuits |  |  |  |  |  |  |  | 3
Plaintiffs' motions for class certification |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Alleged complaints | Lawsuits |  |  |  |  |  |  |  | 8
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 |  |  |
Preliminary Approval of Class Action | Coyle - Arizona |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Legal settlement |  |  |  |  | $ 4,300,000 |  |  |
Lawsuit filing date |  |  |  |  |  |  |  | 7/20/2015
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
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 |  |  |  |
Green - Tennessee |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Lawsuit filing date |  |  |  |  |  |  |  | 2/1/2019

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