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Commitments and Contingencies - Environmental contingencies (Details) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2015 | Dec. 31, 2014
Site Contingency [Line Items] |  |
Estimated Litigation Period (in years) | 5 years |
South Brunswick, New Jersey |  |
Site Contingency [Line Items] |  |
Accrued expenses associated with remediation project | $ 2.4 | $ 2.5
Oakville, Connecticut |  |
Site Contingency [Line Items] |  |
Accrual for Environmental Loss Contingencies | $ 0.1 | $ 0.1

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