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Goodwill - Schedule of Pro Forma Financial Information (Detail) (USD $)
In Millions, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Goodwill And Intangible Assets Disclosure [Abstract]    
Net sales $ 913.1 $ 904.6
Net income $ 85.1 $ 77.2
Earnings per share - basic $ 3.42 $ 3.33
Earnings per share - diluted $ 3.36 $ 3.24