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Segment Information - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Segment
Dec. 31, 2012
Dec. 31, 2011
Segment Reporting Information [Line Items]                      
Number of operating segments                 3    
Net sales $ 219.6 $ 209.3 $ 222.6 $ 199.8 $ 217.7 $ 185.0 $ 204.4 $ 196.1 $ 851.3 $ 803.2 $ 688.7
Outside United States [Member]
                     
Segment Reporting Information [Line Items]                      
Net sales                 301.1 310.5 268.2
Exports From U S To Other Regions [Member]
                     
Segment Reporting Information [Line Items]                      
Net sales                 $ 131.1 $ 127.9 $ 126.1