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Accrued Liabilities (Tables)
3 Months Ended
Mar. 31, 2021
Payables And Accruals [Abstract]  
Summary of Accrued Liabilities

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

 

 

 

March 31,

2021

 

 

December 31,

2020

 

Accrued payroll and other employee related expenses

 

$

204,374

 

 

$

176,379

 

Contract liabilities

 

 

121,193

 

 

 

58,455

 

Accrued business taxes

 

 

91,982

 

 

 

46,717

 

Self-insurance reserves

 

 

73,814

 

 

 

38,642

 

Income taxes payable

 

 

70,216

 

 

 

12,236

 

Accrued interest

 

 

18,000

 

 

 

13,567

 

Accrued rebates payable

 

 

17,041

 

 

 

18,592

 

Other

 

 

32,304

 

 

 

20,948

 

Total accrued liabilities

 

$

628,924

 

 

$

385,536