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Property, Plant and Equipment - Additional Information (Detail) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Property Plant And Equipment [Abstract]      
Amount of assets held under capital leases $ 0.0 $ 0.0 $ 0.0
Depreciation charges 8,900,000 7,000,000 9,200,000
Estimated additional cost to complete work in progress $ 2,200,000 $ 2,700,000