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Accrued Expenses (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Payables And Accruals [Abstract]    
Insurance $ 13,445 $ 15,702
Interest 9,788 3,284
Fuel hedge contracts 8,695  
Contract reserves 5,404 6,248
Payroll and employee benefits 6,768 16,859
Income and other taxes 1,657 1,597
Other 8,141 7,535
Total accrued expenses $ 53,898 $ 51,225