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Other - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Certain Asset Accounts [Line items]      
Depreciation and amortization expense $ 7.7 $ 7.8 $ 7.5
Accumulated depreciation and amortization
     
Certain Asset Accounts [Line items]      
Accumulated Depreciation and amortization 1.9 1.9  
Machinery, furniture and equipment
     
Certain Asset Accounts [Line items]      
Accumulated Depreciation and amortization $ 2.1 $ 2.1