Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Mar. 31, 2024
Loss Contingencies [Line Items]
Revenues	$ 1,123,767			$ 1,128,539	$ 3,372,489	$ 3,133,745
Product [Member]
Loss Contingencies [Line Items]
Revenues	314,397			$ 303,073	944,084	941,174
Defense and Advanced Technologies [Member] | Positive Outcome Of Litigation [Member] | Interest Income [Member]
Loss Contingencies [Line Items]
Revenues						$ 7,200
Defense and Advanced Technologies [Member] | Positive Outcome Of Litigation [Member] | Product [Member]
Loss Contingencies [Line Items]
Revenues		$ 99,900	$ 41,700
Unfavorable Regulatory Action [Member]
Loss Contingencies [Line Items]
U.S. government contract-related reserves	$ 11,400				$ 11,400		$ 16,600