Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation of Interim Period Statements - Additional Information (Detail)

v3.19.3
Basis of Presentation of Interim Period Statements - Additional Information (Detail)
9 Months Ended
Sep. 30, 2019
USD ($)
Company
Sep. 30, 2018
USD ($)
Dec. 31, 2018
USD ($)
Organization Consolidation And Presentation Of Financial Statements [Abstract]      
Revenue recognition professional employer service contracts term 1 year    
Professional employer service contract cancellation and termination period 30 days    
Payment term for staffing customers 30 days    
Number of wholly-owned insurance companies | Company 2    
Cash and cash equivalents, maturity term 3 months    
Allowance for doubtful accounts $ 774,000   $ 533,000
Estimate of liability for unpaid safety incentives 27,700,000   29,200,000
One-time customer Incentive 5,000,000   $ 9,800,000
Interest paid   $ 1,800,000  
Income taxes paid $ 10,100,000 $ 100,000