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Related Parties (Tables)
 6 Months Ended
Jun. 30, 2021
Related Party Transactions [Abstract]  
Schedule of Related Party Transactions
The following is a summary of transactions and balance with affiliates:
 Three Months EndedSix Months Ended
 June 30,
2021		June 30,
2020		June 30,
2021		June 30,
2020
(in thousands)
Sales to affiliates$246 $1,235 $812 $1,888 
Payments to affiliates57 38 130 97 
June 30,
2021		December 31,
2020
(in thousands)
Due from affiliates$39 $342 
Due to affiliates— —