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Commitments and Contingencies - Additional Information (Detail) (USD $) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jun. 30, 2012 | Sep. 30, 2013 | Dec. 31, 2012
Loss Contingencies [Line Items] |  |  |
Potential revision on future environmental remediation costs before tax |  | $ 17,000,000 |
Estimated site remediation liabilities |  | 17,025,000 | 20,322,000
Exit of phosphorous flame retardants business | 8,700,000 |  |
Bergheim, Germany Site |  |  |
Loss Contingencies [Line Items] |  |  |
Estimated site remediation liabilities |  | 7,300,000 |
Pledged land and housing facilities |  | $ 6,000,000 |

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