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Accrued Liabilities
 3 Months Ended
Mar. 31, 2022
Payables and Accruals [Abstract]  
Accrued Liabilities Accrued Liabilities
The following table sets forth additional financial information related to the Company's accrued liabilities:
(in thousands)March 31, 2022December 31, 2021
Accrued salaries and related expenses$63,231 $58,440 
Accrued severance 470 1,720 
Accrued taxes 24,416 17,660 
Accrued expenses 55,424 51,224 
Accrued service credits2,809 2,769 
Accrued liabilities$146,350 $131,813