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Financial Instruments - Additional Information (Detail)
$ in Thousands, € in Millions
1 Months Ended 3 Months Ended 6 Months Ended
Apr. 24, 2020
USD ($)
Apr. 30, 2020
USD ($)
Jul. 31, 2014
USD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2021
EUR (€)
Mar. 31, 2021
USD ($)
Oct. 31, 2019
EUR (€)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                    
Other income (expense), net       $ 400 $ 700 $ 800 $ 700      
Present value of expected payments related to contingent consideration       24,814   24,814     $ 24,706  
Level 3                    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                    
Present value of expected payments related to contingent consideration       24,800   24,800     24,700  
Undiscounted value of payments       $ 67,500   $ 67,500     $ 67,500  
Ecp                    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                    
Payments to acquire businesses     $ 13,000              
Potential payouts payments     $ 15,000              
Ecp | Minimum [Member]                    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                    
Discount rate       1.00%   1.00%   1.00%    
Commercial Milestones           15.00%        
Ecp | Maximum                    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                    
Discount rate       2.00%   2.00%   2.00%    
Commercial Milestones           74.00%        
Breethe                    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                    
Payments to acquire businesses $ 55,000 $ 55,000                
Breethe | Minimum [Member]                    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                    
Discount rate       1.00%   1.00%   1.00%    
Commercial Milestones           15.00%        
Breethe | Maximum                    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                    
Potential payouts payments $ 55,000 $ 55,000                
Discount rate       2.00%   2.00%   2.00%    
Commercial Milestones           75.00%        
Intercompany Agreement [Member]                    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                    
Loans to subsidiaries | €                   € 85.0
Cross Currency Interest Rate Contract                    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                    
Derivative notional amount       $ 93,500   $ 93,500   € 85.0