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Investments in Affiliated Companies - Ownership Percentage (Details) | Mar. 31, 2018
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PQ Silicates Ltd. |
Schedule of Equity Method Investments |
Ownership percentage | 50.00%
Zeolyst International |
Schedule of Equity Method Investments |
Ownership percentage | 50.00%
Zeolyst C.V. |
Schedule of Equity Method Investments |
Ownership percentage | 50.00%
Quaker Holdings |
Schedule of Equity Method Investments |
Ownership percentage | 49.00%

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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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