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Subsequent Events - Estimated Allocation of Purchase Price to Assets Acquired and Liabilities Assumed (Detail) (USD $) In Millions, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Dec. 31, 2012 | Oct. 27, 2014 Subsequent Event [Member] Independence Oilfield Chemicals LLC [Member]
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Business Acquisition [Line Items] |  |  |  |  |
Other intangible assets |  |  |  |  | $ 78.7
Goodwill | 187.9 | 187.9 | 165.3 | 149.0 | 115.8
Other net assets acquired |  |  |  |  | 18.3
Purchase price, net of cash acquired |  |  |  |  | $ 212.8

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- Definition Amount of intangible assets, excluding goodwill, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 + Details
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- Definition Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 + Details
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