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Accounts Payable and Accrued Liabilities
 3 Months Ended
Mar. 31, 2021
Payables and Accruals [Abstract]  
Accounts Payable and Accrued Liabilities Accounts Payable and Accrued Liabilities
    Accounts payable and accrued liabilities at March 31, 2021 and December 31, 2020 consisted of the following (in thousands):
March 31,December 31,
20212020
Accounts payable$30,999 $22,277 
Accrued compensation22,884 23,212 
Accrued property and other taxes13,294 14,420 
Accrued severance and other charges97 2,666 
Income taxes14,364 16,029 
Affiliated (1)
2,238 2,513 
Accrued purchase orders and other23,209 18,869 
Total accounts payable and accrued liabilities$107,085 $99,986 
(1)Represents amounts owed to non-consolidated affiliates.