Related Parties (Tables)

12 Months Ended

Dec. 31, 2019

Related Party Transactions [Abstract]

Schedule of Related Party Transactions

	December 31,
	2019		2018
	(In thousands)
Trade receivables from DGW KG	$	537	$	651
Trade payables to DGW KG	$	17,671	$	18,615

	Years Ended December 31,
	2019		2018		2017
	(In thousands)
Purchased carbon black products from DGW KG	$	89,404	$	93,536	$	79,270
Sales and services provided to DGW KG	$	2,724	$	6,464	$	2,627