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Property, Plant And Equipment - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Property, Plant and Equipment [Line Items]      
Depreciation expense related to property and equipment $ 8,953,000 $ 9,622,000 $ 8,493,000
Write off of property and equipment $ 549,000 $ 5,358,000 $ 0