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Segment Information - Segment Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Segment Reporting Information [Line Items]      
Net sales $ 169,148 $ 157,555  
Income (loss) from operations 3,693 13,852  
Interest expense (11,996) (14,839)  
Other income, net 313 722  
Other   810  
Loss from continuing operations before benefit for income taxes and share of net income from joint venture (7,990) (177)  
Total assets 1,485,082   $ 1,475,003
Mobile Solutions [Member]      
Segment Reporting Information [Line Items]      
Net sales 89,794 86,446  
Income (loss) from operations 9,785 10,601  
Total assets 453,521   428,321
Power Solutions [Member]      
Segment Reporting Information [Line Items]      
Net sales 48,682 48,424  
Income (loss) from operations 5,233 6,795  
Total assets 393,048   383,063
Life Sciences [Member]      
Segment Reporting Information [Line Items]      
Net sales 31,200 23,129  
Income (loss) from operations 4,204 3,622  
Total assets 362,744   355,703
Corporate and Consolidations [Member]      
Segment Reporting Information [Line Items]      
Net sales (528) (444)  
Income (loss) from operations (15,529) $ (7,166)  
Total assets $ 275,769   $ 307,916