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Acquisitions - Additional Information (Detail) (USD $) | 12 Months Ended | 0 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2013 Antioxidant, Ibuprofen and Propofol Assets | Dec. 31, 2011 Catilin Inc. | Dec. 31, 2011 Tmg Manufacturing Site | Oct. 02, 2013 Cambridge Chemical Company
Business Acquisition [Line Items] |  |  |  |  |  |  |
Consideration transferred |  |  |  |  |  |  | $ 3,600,000
Cash payments related to acquisitions | $ 2,565,000 | $ 3,360,000 | $ 13,164,000 | $ 2,300,000 | $ 4,500,000 | $ 6,500,000 |

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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479 + Details
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