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Property, Plant and Equipment - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Property Plant and Equipment Useful Life And Values [Abstract]      
Depreciation expense $ 20.0us-gaap_Depreciation $ 15.8us-gaap_Depreciation $ 14.3us-gaap_Depreciation