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Acquisition (Narrative) (Details) - USD ($)
$ in Thousands
6 Months Ended
Jul. 01, 2021
Sep. 30, 2021
Mar. 31, 2021
Business Acquisition [Line Items]      
Goodwill   $ 578,797 $ 578,079
Akorn Operating Company LLC      
Business Acquisition [Line Items]      
Purchase price $ 228,900    
Supply commitment, term of agreement   3 years  
Business combination, non-amortizable intangible assets, allocated amount 204,100    
Business combination, amortizable intangible assets, allocated amount 24,900    
Intangible asset, useful life   12 years 6 months  
Goodwill 1,758    
Customer Relationships | Akorn Operating Company LLC      
Business Acquisition [Line Items]      
Business combination, non-amortizable intangible assets, allocated amount 19,600    
Trademarks | Akorn Operating Company LLC      
Business Acquisition [Line Items]      
Business combination, non-amortizable intangible assets, allocated amount 5,300    
General and Administrative Expense | Akorn Operating Company LLC      
Business Acquisition [Line Items]      
Business acquisition, transaction costs $ 5,100