Investments in Associated Companies - Summarized Financial Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Equity in net income of associated companies	$ 9,379	$ 7,352	$ 5,064
Houghton Korea [Member]
Equity in net income of associated companies	3,808	5,241	2,337
Nippon Quaker (Japan) [Member]
Equity in net income of associated companies	461	853	850
Kelko (Panama) [Member]
Equity in net income of associated companies	154	107	55
Grindaix [Member]
Equity in net income of associated companies	(37)	0	0
Primex (Barbados) [Member]
Equity in net income of associated companies	$ 4,993	$ 1,151	$ 1,822