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Business Acquisition - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Aug. 21, 2018
Sep. 30, 2018
Sep. 30, 2018
Sep. 30, 2017
Business Acquisition [Line Items]        
Amortization of intangible assets     $ 10,341 $ 6,238
Blue Microphones Holding Corporation        
Business Acquisition [Line Items]        
Payments to acquire business, gross $ 134,900      
Inventory adjustment due to purchase accounting $ 1,800      
Business acquisition related costs   $ 1,500    
Net sales contributed by acquiree   $ 7,700    
Percent of net sales contributed by acquiree   1.00%    
Developed technology | Blue Microphones Holding Corporation        
Business Acquisition [Line Items]        
Amortization of intangible assets   $ 200    
Customer relationships and trade name | Blue Microphones Holding Corporation        
Business Acquisition [Line Items]        
Amortization of intangible assets   $ 300    
Level 3 | Developed technology | Blue Microphones Holding Corporation        
Business Acquisition [Line Items]        
Royalty rate for fair value measurement 10.00%      
Level 3 | Trade name | Blue Microphones Holding Corporation        
Business Acquisition [Line Items]        
Royalty rate for fair value measurement 3.00%      
Discount rate for value measurement 11.00%      
Discount Rate | Level 3 | Developed technology | Blue Microphones Holding Corporation        
Business Acquisition [Line Items]        
Discount rate for value measurement 11.00%      
Discount Rate | Level 3 | Customer relationships | Blue Microphones Holding Corporation        
Business Acquisition [Line Items]        
Discount rate for value measurement 11.00%