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Business Segment Information - Property and Equipment Additions, Depreciation and Amortization and Identifiable Assets (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Segment Reporting Information [Line Items]          
Property and equipment additions $ 2,544 $ 1,306 $ 3,746 $ 1,897  
Depreciation and amortization 2,633 3,937 8,153 10,097  
Identifiable assets 389,640   389,640   $ 392,582
Energy Solutions Segment [Member]          
Segment Reporting Information [Line Items]          
Property and equipment additions 57 6 218 38  
Depreciation and amortization 1,544 2,379 4,684 6,286  
Identifiable assets 246,630   246,630   245,842
Industrial Solutions Segment [Member]          
Segment Reporting Information [Line Items]          
Property and equipment additions 59 533 222 697  
Depreciation and amortization 327 361 998 803  
Identifiable assets 58,250   58,250   55,582
Fluid Handling Solutions Segment [Member]          
Segment Reporting Information [Line Items]          
Property and equipment additions 2,135 767 2,624 1,051  
Depreciation and amortization 668 1,168 2,140 2,675  
Identifiable assets 71,778   71,778   72,507
Corporate and Other [Member]          
Segment Reporting Information [Line Items]          
Property and equipment additions 293   682 111  
Depreciation and amortization 94 $ 29 331 $ 333  
Identifiable assets $ 12,982   $ 12,982   $ 18,651