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Acquisitions - Additional Information (Detail)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Nov. 08, 2018
$ / shares
Jun. 30, 2020
USD ($)
Mar. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Sep. 30, 2019
USD ($)
Jun. 30, 2019
USD ($)
Mar. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Sep. 30, 2018
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Jun. 30, 2018
USD ($)
Business Acquisition [Line Items]                        
Cost of goods sold   $ 444,153 $ 381,108 $ 517,991 $ 217,269 $ 224,076 $ 215,212 $ 211,333 $ 190,526 $ 1,560,521 $ 841,147 $ 696,591
Goodwill   1,239,009       $ 319,778       1,239,009 $ 319,778 $ 270,678
Finisar Corporation                        
Business Acquisition [Line Items]                        
Percentage of aggregate Merger Consideration in cash 60.00%                      
Percentage of aggregate Merger Consideration in stock 40.00%                      
Acquisition related costs                   44,400    
Business acquisition, revenue of acquired entity                   938,400    
Business acquisition, net loss of acquired entity                   94,600    
Amortization                   47,400    
Restructuring and related charges                   26,100    
Goodwill   $ 919,192     $ 759,239         919,192    
Finisar Corporation | Proration Adjustment                        
Business Acquisition [Line Items]                        
Common stock stock price (in usd per share) | $ / shares $ 46.88                      
Finisar Corporation | Fair Value Adjustment to Inventory                        
Business Acquisition [Line Items]                        
Cost of goods sold                   $ 87,700    
Finisar Corporation | Cash Consideration                        
Business Acquisition [Line Items]                        
Acquisition, cash consideration per share (in usd per share) | $ / shares 26.00                      
Finisar Corporation | Cash Consideration | Proration Adjustment                        
Business Acquisition [Line Items]                        
Acquisition, cash consideration per share (in usd per share) | $ / shares $ 15.94                      
Business acquisition number of shares to be received by acquiree (in shares) 0.2146                      
Finisar Corporation | Stock Consideration                        
Business Acquisition [Line Items]                        
Business acquisition number of shares to be received by acquiree (in shares) 0.5546                      
Finisar Corporation | Mixed Consideration                        
Business Acquisition [Line Items]                        
Acquisition, cash consideration per share (in usd per share) | $ / shares $ 15.60                      
Business acquisition number of shares to be received by acquiree (in shares) 0.2218