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Accounts Receivable, net (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Receivables [Abstract]    
Trade accounts receivable, net of allowance for credit losses of $4,112 and $3,857, respectively $ 67,171 $ 65,684
Allowance for credit losses 4,112 3,857
Unbilled receivables 29,923 26,215
Taxes receivable 15,392 14,292
Affiliated 549 549
Other receivables 3,546 3,867
Total accounts receivable, net $ 116,581 $ 110,607