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,
	2021		2020		2021		2020
Sales to unconsolidated affiliates	$	4,998	$	5,281	$	10,728	$	12,498
Purchases from unconsolidated affiliates(a)	$	55,771	$	55,149	$	88,921	$	131,624

(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, 2021		December 31, 2020
Receivables from unconsolidated affiliates	$	2,771	$	4,098
Payables to unconsolidated affiliates	$	37,795	$	30,123