Commitments and Contingencies - Additional Information (Detail)						1 Months Ended		6 Months Ended
	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