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Business Acquisition - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Aug. 11, 2017
Sep. 30, 2017
Sep. 30, 2017
Sep. 30, 2016
Business Acquisition [Line Items]        
Amortization of intangible assets     $ 6,238 $ 3,867
Astro Gaming        
Business Acquisition [Line Items]        
Payments to acquire business, gross $ 85,000      
Inventory adjustment due to purchase accounting $ 800      
Business acquisition related costs   $ 700 $ 1,000  
Developed technology | Astro Gaming        
Business Acquisition [Line Items]        
Amortization of intangible assets   400    
Customer relationships and trade name | Astro Gaming        
Business Acquisition [Line Items]        
Amortization of intangible assets   $ 700    
Level 3 | Developed technology | Astro Gaming        
Business Acquisition [Line Items]        
Royalty rate for fair value measurement 10.00%      
Discount rate for value measurement 13.00%      
Level 3 | Customer relationships | Astro Gaming        
Business Acquisition [Line Items]        
Discount rate for value measurement 13.00%      
Level 3 | Trade name | Astro Gaming        
Business Acquisition [Line Items]        
Royalty rate for fair value measurement 2.00%      
Discount rate for value measurement 13.00%