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Accrued Liabilities
6 Months Ended
Jun. 30, 2021
Payables And Accruals [Abstract]  
Accrued Liabilities

8. Accrued Liabilities

Accrued liabilities consisted of the following (in thousands) as of:

 

 

 

June 30,

2021

 

 

December 31,

2020

 

Accrued payroll and other employee related expenses

 

$

336,380

 

 

$

176,379

 

Contract liabilities

 

 

149,206

 

 

 

58,455

 

Accrued business taxes

 

 

98,124

 

 

 

46,717

 

Income taxes payable

 

 

78,807

 

 

 

12,236

 

Self-insurance reserves

 

 

72,316

 

 

 

38,642

 

Accrued rebates payable

 

 

28,539

 

 

 

18,592

 

Accrued interest

 

 

13,179

 

 

 

13,567

 

Other

 

 

55,301

 

 

 

20,948

 

Total accrued liabilities

 

$

831,852

 

 

$

385,536