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Business Segment Information - Property and Equipment Additions, Depreciation and Amortization and Identifiable Assets (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Segment Reporting Information [Line Items]      
Property and equipment additions $ 3,090 $ 1,028 $ 5,461
Depreciation and amortization 13,272 16,088 18,903
Identifiable assets 392,582 438,549  
Energy Solutions Segment [Member]      
Segment Reporting Information [Line Items]      
Property and equipment additions 205 444 672
Depreciation and amortization 8,112 9,675 11,557
Identifiable assets 245,842 258,218  
Industrial Solutions Segment [Member]      
Segment Reporting Information [Line Items]      
Property and equipment additions 756 160 301
Depreciation and amortization 1,067 1,488 1,814
Identifiable assets 54,179 66,723  
Fluid Handling Solutions Segment [Member]      
Segment Reporting Information [Line Items]      
Property and equipment additions 1,226 382 4,481
Depreciation and amortization 3,517 4,754 5,406
Identifiable assets 73,910 100,917  
Corporate and Other [Member]      
Segment Reporting Information [Line Items]      
Property and equipment additions 903 42 7
Depreciation and amortization 576 171 $ 126
Identifiable assets $ 18,651 $ 12,691