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Acquisitions (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 13, 2015
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2015
Business Acquisition [Line Items]        
Cash paid for acquisitions, net of cash acquired   $ 35,169 $ 12 $ 92,217
Angelic [Member]        
Business Acquisition [Line Items]        
Purchase price   35,487    
Angelic [Member] | Tradename [Member]        
Business Acquisition [Line Items]        
Finite-lived intangible assets acquired   $ 15,800    
Finite-lived intangible assets acquired, useful life (in years)   20 years    
Angelic [Member] | Customer Relationships [Member]        
Business Acquisition [Line Items]        
Finite-lived intangible assets acquired   $ 300    
Finite-lived intangible assets acquired, useful life (in years)   10 years    
Angelic [Member] | Technology / Know-how [Member]        
Business Acquisition [Line Items]        
Finite-lived intangible assets acquired   $ 2,400    
Finite-lived intangible assets acquired, useful life (in years)   10 years    
Angelic [Member] | Non-compete Agreements [Member]        
Business Acquisition [Line Items]        
Finite-lived intangible assets acquired   $ 200    
Finite-lived intangible assets acquired, useful life (in years)   5 years    
Flatout [Member]        
Business Acquisition [Line Items]        
Cash paid for acquisitions, net of cash acquired $ 92,200