XML 54 R42.htm IDEA: XBRL DOCUMENT v3.20.2
Acquisitions (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Feb. 13, 2020
Jan. 15, 2020
Aug. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Business Acquisition [Line Items]                
Goodwill       $ 378,740   $ 378,740   $ 329,705
Total acquisition-related costs       1,222 $ 4 2,482 $ 4  
Delta Separations                
Business Acquisition [Line Items]                
Aggregate consideration for acquisition $ 47,100              
Goodwill $ 32,906              
Thermo Energy Systems                
Business Acquisition [Line Items]                
Aggregate consideration for acquisition   $ 7,300            
Goodwill   $ 16,062            
Apeks                
Business Acquisition [Line Items]                
Aggregate consideration for acquisition     $ 12,600          
Goodwill     $ 6,436          
Selling, general and administrative costs                
Business Acquisition [Line Items]                
Total acquisition-related costs       $ 588 $ 4 $ 1,848 $ 4