Business Acquisitions - Narrative (Details) $ in Thousands, € in Millions, ₨ in Millions, $ in Millions	3 Months Ended					12 Months Ended
	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Mar. 31, 2016 EUR (€)	Mar. 31, 2016 USD ($)	Sep. 30, 2015 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2017 INR (₨)	Dec. 31, 2017 USD ($)	Jun. 30, 2017 CAD ($)	Jun. 30, 2017 USD ($)	Dec. 31, 2016 CAD ($)	Dec. 31, 2016 USD ($)	Jun. 30, 2016 USD ($)	Sep. 30, 2015 EUR (€)	Sep. 30, 2015 USD ($)
Business Acquisition [Line Items]
Goodwill						$ 83,333				$ 86,034				$ 80,804
Business Combination Transaction-related Expenses						19,500	$ 30,800	$ 1,500
Other current liabilities						$ 31,108				27,321
Mining [Member]
Business Acquisition [Line Items]
Cash Paid for Acquisitions															$ 1,900
Verkol [Member]
Business Acquisition [Line Items]
Cash Paid for Acquisitions																€ 37.7	$ 41,400
Post Closing Adjustment			€ 1.3	$ 1,400
Business Combination Transaction-related Expenses					$ 2,800
Mining North America [Member] | Trademarks Formulations And Product Technology [Member]
Business Acquisition [Line Items]
Cash Paid for Acquisitions	$ 500
Intangibles	$ 1,000
Intangible Assets, Amortizable Life	10 years
Other current liabilities	$ 500
Lubricor [Member]
Business Acquisition [Line Items]
Cash Paid for Acquisitions													$ 16.0	$ 12,000
Post Closing Adjustment		$ 100
Metal Working North America [Member]
Business Acquisition [Line Items]
Cash Paid for Acquisitions											$ 7.3	$ 5,400
India [Member]
Business Acquisition [Line Items]
Cash Paid for Acquisitions									₨ 2,025.0	$ 31,800
Percentage of Voting Interests Acquired									45.00%	45.00%
Adjustments To Additional Paid In Capital Other		$ 21,200