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Acquisitions (Narrative) (Details) - USD ($)
$ in Thousands
6 Months Ended
Jul. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Jun. 30, 2018
Business Acquisition [Line Items]        
Consideration transferred, net of cash acquired   $ 32,183 $ 143,768  
Liability for contingent consideration, current and non-current portion   71,886   $ 108,233
POS Portal [Member]        
Business Acquisition [Line Items]        
Consideration transferred, net of cash acquired $ 143,768      
Payments to acquire business     $ 3,400  
Consideration transferred, initial purchase price 144,900      
Cash acquired 4,600      
Liability for contingent consideration, current and non-current portion 13,098      
Purchase price in escrow   $ 13,100    
Weighted average useful life   10 years    
Maximum [Member] | POS Portal [Member]        
Business Acquisition [Line Items]        
Liability for contingent consideration, current and non-current portion $ 13,200