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Business Acquisitions (Details) - USD ($)
$ in Thousands
2 Months Ended
Sep. 30, 2019
Apr. 29, 2019
May 31, 2020
Aug. 31, 2019
Business Acquisition [Line Items]        
Goodwill     $ 700,735 $ 622,255
JJMD        
Business Acquisition [Line Items]        
Amount of cash paid for business acquisitions $ 111,800 $ 167,400    
Assets acquired 199,700 173,500    
Liabilities assumed 87,900 $ 6,100    
Contract assets 83,200      
Inventory 35,100      
Goodwill 70,400      
Pension obligation $ 73,500