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Consolidated Statements Of Income (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Consolidated Statements Of Income [Abstract]
Net sales	$ 202.1	$ 174.0	$ 573.9	$ 505.9
Cost of goods sold	(144.4)	(119.4)	(405.3)	(345.9)
Gross profit	57.7	54.6	168.6	160.0
Operating expenses:
Selling, general and administrative	(72.6)	(28.6)	(127.1)	(80.0)
Research and development	(4.7)	(4.5)	(13.7)	(13.0)
Restructuring charge	0	0	0	(8.5)
Impairment of Octane Additives segment Goodwill	(0.6)	(0.6)	(1.7)	(1.7)
Profit on disposal	0	0	0	0.2
Total operating expenses	(77.9)	(33.7)	(142.5)	(103.0)
Operating (loss)/income	(20.2)	20.9	26.1	57.0
Other net (expense)/income	(4.3)	11.6	8.9	0.7
Interest expense	(0.8)	(1.3)	(2.8)	(3.8)
Interest income	0.1	0.1	0.4	0.3
(Loss)/income before income taxes	(25.2)	31.3	32.6	54.2
Income taxes	8.4	(1.3)	(3.3)	(4.8)
Net (loss)/income	$ (16.8)	$ 30.0	$ 29.3	$ 49.4
(Loss)/earnings per share:
Basic	$ (0.71)	$ 1.26	$ 1.24	$ 2.08
Diluted	$ (0.71)	$ 1.20	$ 1.19	$ 1.98
Weighted average shares outstanding (in thousands):
Basic	23,711	23,805	23,698	23,757
Diluted	23,711	25,002	24,616	24,931

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The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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