Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Insurance (Details)

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Commitments and Contingencies - Insurance (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Commitment And Contingencies [Line Items]    
Insurance and other non-current liabilities $ 383,564 $ 391,221
Employer's Liability, Workers' Compensation, Auto Liability, General Liability and Group Health Care Claims    
Commitment And Contingencies [Line Items]    
Gross amount accrued for insurance claims 303,100 319,500
Insurance and other non-current liabilities 224,900 238,000
Related insurance recoveries/receivables 26,100 35,600
Related insurance recoveries/receivables included in prepaid expenses and other current assets 400 400
Long-term insurance receivables $ 25,700 $ 35,200