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Goodwill - Goodwill, Net (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Sep. 30, 2018
Jun. 30, 2018
Goodwill:    
Goodwill, net, ending balance $ 75,649  
Subscription and software    
Goodwill:    
Goodwill, gross, beginning balance 142,316  
Accumulated impairment losses, beginning balance (65,569)  
Goodwill, net, beginning balance 75,590  
Effect of currency translation (1,098)  
Goodwill, gross, ending balance 142,316 $ 142,316
Accumulated impairment losses, ending balance (65,569) (65,569)
Goodwill, net, ending balance 75,649 75,590
Goodwill Foreign Currency Translation Gain Loss [Member] | Subscription and software    
Goodwill:    
Effect of currency translation $ 59 $ (1,157)