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Accounts Receivable (Tables)
12 Months Ended
Dec. 31, 2021
Accounts Receivable.  
Schedule of components of accounts receivables

December 31, 

    

2021

    

2020

(in thousands)

  

  

Trade receivables:

 

  

 

  

Billed

$

181,500

$

135,201

Unbilled

 

70,353

 

29,754

Other receivables

 

13,547

 

1,631

Total

 

265,400

 

166,586

Less: allowance for credit losses

 

(6,765)

 

(4,815)

Accounts receivable, net

$

258,635

$

161,771