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Related Party Transactions (Tables)
 9 Months Ended
Sep. 30, 2020
Related Party Transactions [Abstract]  
Schedule of Related Party Transactions
Our consolidated statements of income include sales to and purchases from unconsolidated affiliates in the ordinary course of business as follows (in thousands):
Three Months Ended
September 30,		Nine Months Ended
September 30,
2020201920202019
Sales to unconsolidated affiliates$4,863 $4,465 $17,361 $14,128 
Purchases from unconsolidated affiliates(a)
$10,742 $41,304 $142,366 $160,420 
(a)Purchases from unconsolidated affiliates primarily relate to purchases from our Windfield joint venture.

Our condensed consolidated balance sheets include accounts receivable due from and payable to unconsolidated affiliates in the ordinary course of business as follows (in thousands):
September 30, 2020December 31, 2019
Receivables from unconsolidated affiliates$2,765 $7,163 
Payables to unconsolidated affiliates$7,263 $35,502