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Business and Credit Concentrations - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Sep. 30, 2014
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Sep. 30, 2013
|
Sep. 30, 2014
|
Sep. 30, 2013
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Dec. 31, 2013
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Sep. 30, 2014
Net Sales [Member]
Customer Concentration Risk [Member]
Customer
|
Sep. 30, 2013
Net Sales [Member]
Customer Concentration Risk [Member]
Customer
|
Sep. 30, 2014
Net Sales [Member]
Customer Concentration Risk [Member]
Customer
|
Sep. 30, 2013
Net Sales [Member]
Customer Concentration Risk [Member]
Customer
|
Sep. 30, 2014
Net Trade Receivable [Member]
Credit Concentration Risk [Member]
Customer
|
Dec. 31, 2013
Net Trade Receivable [Member]
Credit Concentration Risk [Member]
Customer
|
Sep. 30, 2014
Domestic [Member]
|
Dec. 31, 2013
Domestic [Member]
|
Sep. 30, 2014
Foreign [Member]
|
Dec. 31, 2013
Foreign [Member]
|
|
| Concentration Risk [Line Items] | |||||||||||||||
| Accounts receivable | $ 180.2 | $ 138.4 | $ 176.5 | $ 103.5 | |||||||||||
| Charges for bad debt and reserves for credit losses | 1.9 | 1.3 | 6.8 | 2.3 | |||||||||||
| Net assets held outside the United States | $ 503.1 | $ 503.1 | $ 413.2 | ||||||||||||
| Number of customers accounting for more than 10% | 0 | 0 | 0 | 0 | 0 | 0 | |||||||||
| Number of largest customers | 5 | 5 | 5 | 5 | |||||||||||
| Percentage of net sales to largest customers | 14.80% | 17.90% | 15.90% | 18.30% | |||||||||||