Litigation (Details) $ in Millions	2 Months Ended	12 Months Ended
	Feb. 15, 2019 Case	Dec. 31, 2018 USD ($) Case	Oct. 24, 2014 USD ($)
Site Contingency [Abstract]
Consent decree paid by US government | $			$ 2.3
Silica Cases [Member]
Loss Contingency, Information about Litigation Matters [Abstract]
Number of pending cases		3
Cumulative number of cases dismissed		1,493
Number of cases dismissed		0
Number of lawsuits settled		1
Asbestos Cases [Member]
Loss Contingency, Information about Litigation Matters [Abstract]
Number of pending cases		34
Cumulative number of cases dismissed		57
Number of new cases filed		14
Number of cases dismissed		4
Number of cases claim liability		25
Number of allege liability		6
Number of cases with no alleged exposure date		5
Asbestos Cases [Member] | Subsequent Event [Member]
Loss Contingency, Information about Litigation Matters [Abstract]
Number of new cases filed	4
Asbestos Cases [Member] | AMCOL International Corporation [Member]
Loss Contingency, Information about Litigation Matters [Abstract]
Number of allege liability		3
Administrative Consent Order for Contamination Associated with Historic Use of PCBs [Member]
Site Contingency [Abstract]
Location of plant		Canaan, Connecticut
Estimated accrued remediation cost | $		$ 0.4
Administrative Consent Order for Installation of Groundwater Contamination System [Member]
Site Contingency [Abstract]
Location of plant		Adams, Massachusetts plant
Estimated accrued remediation cost | $		$ 0.4
Estimated cost of wastewater treatment upgrades, lower range | $		6.0
Estimated cost of wastewater treatment upgrades, upper range | $		$ 8.0