Contingencies - Additional Information (Detail) - USD ($) $ in Thousands			6 Months Ended	12 Months Ended
	May 08, 2023	Jul. 08, 2022	Sep. 30, 2023	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021
Loss Contingencies [Line Items]
Revenues				$ 2,556,158	$ 2,417,179	$ 1,920,878
Product [Member]
Loss Contingencies [Line Items]
Revenues				954,126	860,726	$ 739,373
Positive Outcome of Litigation [Member]
Loss Contingencies [Line Items]
Legal settlement received		$ 62,200
Interest income			$ 6,400
Positive Outcome of Litigation [Member] | Subsequent Event [Member]
Loss Contingencies [Line Items]
Legal settlement received	$ 97,500
Positive Outcome of Litigation [Member] | Product [Member]
Loss Contingencies [Line Items]
Revenues			$ 55,800
Unfavorable Regulatory Action [Member]
Loss Contingencies [Line Items]
U.S. government contract-related reserves				$ 12,900	$ 12,100