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Commitments and Contingencies - Additional Information (Detail) - Isolated Service Incident [Member] - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Dec. 31, 2019
Sep. 26, 2019
Commitments And Contingencies [Line Items]        
Duplicate payments for payroll customers       $ 18.8
Loss on unrecovered duplicate payments   $ 11.2    
Recovery efforts resulting in collection $ 0.3      
Selling, General and Administrative Expense [Member]        
Commitments And Contingencies [Line Items]        
Loss on unrecovered duplicate payments     $ 11.2