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Intangible Assets (Details Textual) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011 | Dec. 31, 2011 | Dec. 31, 2010
Intangible Assets (Textual) [Abstract] |  |  |  |  |  |
Intangible asset | $ 54.7 | $ 48.3 | $ 54.7 | $ 48.3 | $ 51.2 | $ 48.1
Amortization expense | 1.0 | 1.1 | 2.0 | 2.3 |  |
Ethyl [Member] |  |  |  |  |  |
Intangible Assets (Textual) [Abstract] |  |  |  |  |  |
Intangible asset | 22.1 |  | 22.1 |  |  |
Amortization expense |  |  | 0.7 | 1.0 |  |
Others [Member] |  |  |  |  |  |
Intangible Assets (Textual) [Abstract] |  |  |  |  |  |
Assets being amortized duration |  |  | 13 years |  |  |
Intangible asset | 26.0 |  | 26.0 |  |  |
Amortization expense |  |  | 0.5 | 0.5 |  |
Others, amortization recognized in selling, general and administrative expenses [Member] |  |  |  |  |  |
Intangible Assets (Textual) [Abstract] |  |  |  |  |  |
Amortization expense |  |  | 0.8 | 0.8 |  |
Internally Developed Software and Other Costs [Member] |  |  |  |  |  |
Intangible Assets (Textual) [Abstract] |  |  |  |  |  |
Intangible asset | 6.6 | 0 | 6.6 | 0 |  |
Amortization expense |  |  | $ 0 | $ 0 |  |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: 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=6943989&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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