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Business Restructuring - Additional Information (Detail) | 3 Months Ended | 6 Months Ended
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Dec. 31, 2014 USD ($) Employees | Sep. 30, 2014 Employees | Jun. 30, 2014 USD ($) | Dec. 31, 2013 USD ($) | Jun. 30, 2014 USD ($)
2014 Restructuring [Member] |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |
Number positions eliminated | Employees | 13 |  |  |  |
Restructuring charges | $ 1,722,000 |  |  |  |
2013 Restructuring [Member] | Surfactants [Member] |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |
Restructuring charges |  |  |  | $ 1,040,000 |
Accelerated depreciation expenses |  |  | $ 918,000 |  | $ 1,825,000
2013 Restructuring [Member] | North America [Member] | Surfactants [Member] |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |
Number positions eliminated | Employees |  | 16 |  |  |

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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
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