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Goodwill (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Feb. 28, 2023
Feb. 28, 2022
Feb. 28, 2021
Mar. 31, 2023
Mar. 31, 2022
Jul. 01, 2021
Mar. 31, 2021
Goodwill [Line Items]              
Goodwill       $ 527,553 $ 578,976   $ 578,079
Goodwill, impairment loss       $ 48,805 340    
Measurement Input, Long-term Revenue Growth Rate              
Goodwill [Line Items]              
Indefinite-lived intangible asset, increase (decrease) in measurement input 10.00%     10.00%      
Measurement Input, Discount Rate              
Goodwill [Line Items]              
Indefinite-lived intangible asset, increase (decrease) in measurement input       0.50%      
Measurement Input, Cap Rate              
Goodwill [Line Items]              
Indefinite-lived intangible asset, increase (decrease) in measurement input       0.50%      
Akorn Operating Company LLC              
Goodwill [Line Items]              
Goodwill           $ 1,098  
International OTC Healthcare              
Goodwill [Line Items]              
Goodwill       $ 28,617 30,685   $ 31,436
Goodwill, impairment loss   $ 300 $ 1,200 $ 0 $ 340