Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Accounts payable and other accrued liabilities
Accounts payable	$ 20,177	$ 20,267
Accrued liabilities	15,356	12,965
Total Accounts payable and other accrued liabilities	35,533	33,232
Accrued payroll costs
Payroll and benefits	38,257	38,035
Payroll taxes	21,842	992
Health insurance liabilities	4,641	3,907
Workers’ compensation liabilities	1,109	1,067
Total Accrued payroll costs	65,849	$ 44,001
Deferred Payroll Taxes | COVID-19
Accrued payroll costs
Payroll tax CARES act liability	$ 19,300