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Acquisition - Schedule of Estimated Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Dec. 31, 2018
Business Acquisition [Line Items]      
Goodwill $ 159,107 $ 152,020 $ 152,156
Environmental Integrated Solutions [Member]      
Business Acquisition [Line Items]      
Current assets 6,416    
Property and equipment 26    
Other assets 44    
Goodwill 7,022    
Intangible - finite life 4,840    
Total assets acquired 18,348    
Current liabilities assumed (6,514)    
Deferred income tax liability (920)    
Net assets acquired $ 10,914