Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
Basis of Presentation of Interim Period Statements - Additional Information (Detail)
3 Months Ended 6 Months Ended
Jun. 30, 2020
USD ($)
Company
Jun. 30, 2020
USD ($)
Company
Jun. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
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 2    
Cash and cash equivalents, maturity term   3 months    
Allowance for doubtful accounts $ 821,000 $ 821,000   $ 888,000
Estimate of liability for unpaid safety incentives 25,800,000 $ 25,800,000   $ 28,000,000.0
Income taxes paid $ 0   $ 0