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Related Party Transactions (Tables)
 6 Months Ended
Jun. 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
June 30,		Six Months Ended
June 30,
2020201920202019
Sales to unconsolidated affiliates$5,281  $5,372  $12,498  $9,663  
Purchases from unconsolidated affiliates(a)
$55,149  $55,617  $131,624  $119,116  
(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):
June 30, 2020December 31, 2019
Receivables from unconsolidated affiliates$4,454  $7,163  
Payables to unconsolidated affiliates$30,368  $35,502