Commitments and Contingencies - Additional Information (Detail) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2014 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2014 BRL	Sep. 30, 2014 Notes Payable, Other Payables USD ($)	Sep. 30, 2014 Lcy Chemical Corporation
Commitments And Contingencies [Line Items]
Tax credits generated from purchase of certain goods	$ 2.5	$ 2.5	6.1
Percentage of equity investment					50.00%
Termination fee		25
Cost of production downtime	1.0	12.0
Loss Contingency Accrual				$ 2.6