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Property, Plant & Equipment, Net - Schedule of Property, Plant & Equipment, Net (Detail) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Property, Plant & Equipment [Line Items]    
Property, plant & equipment, gross $ 176,565 $ 189,272
Less: accumulated depreciation and amortization (82,788) (96,273)
Total property, plant & equipment, net 93,777 92,999
Land    
Property, Plant & Equipment [Line Items]    
Property, plant & equipment, gross 13,450 13,450
Buildings    
Property, Plant & Equipment [Line Items]    
Property, plant & equipment, gross 63,689 76,059
Machinery, equipment and fixtures    
Property, Plant & Equipment [Line Items]    
Property, plant & equipment, gross 69,330 71,870
Construction in progress    
Property, Plant & Equipment [Line Items]    
Property, plant & equipment, gross 9,816 7,622
Computer software    
Property, Plant & Equipment [Line Items]    
Property, plant & equipment, gross $ 20,280 $ 20,271