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Goodwill and Intangible Assets - Goodwill / Tradename (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Goodwill [Line Items]      
Goodwill, beginning balance $ 166,951 $ 170,153  
Goodwill, impairment charge 0 (4,443) $ (53,800)
Goodwill, divestitures (14,317)    
Goodwill, foreign currency translation (478) 1,241  
Goodwill, ending balance 152,156 166,951 170,153
Tradename, beginning balance 19,691 22,042  
Tradename, impairment charge   (2,725)  
Tradename, divestitures (1,340)    
Tradename, foreign currency adjustments (93) 374  
Tradename, ending balance 18,258 19,691 22,042
Energy Solutions Segment [Member]      
Goodwill [Line Items]      
Goodwill, beginning balance 98,408 101,610  
Goodwill, impairment charge   (4,443)  
Goodwill, foreign currency translation (478) 1,241  
Goodwill, ending balance 97,930 98,408 101,610
Industrial Solutions Segment [Member]      
Goodwill [Line Items]      
Goodwill, beginning balance 22,419 22,419  
Goodwill, ending balance 22,419 22,419 22,419
Fluid Handling Segment [Member]      
Goodwill [Line Items]      
Goodwill, beginning balance 46,124 46,124  
Goodwill, divestitures (14,317)    
Goodwill, ending balance $ 31,807 $ 46,124 $ 46,124