Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands			3 Months Ended		6 Months Ended
	May 08, 2023	Jul. 08, 2022	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Mar. 31, 2023
Loss Contingencies [Line Items]
Revenues			$ 1,225,415	$ 663,559	$ 2,005,206	$ 1,238,615
Interest income			32,486	6,809	51,675	6,932
Positive Outcome Of Litigation [Member]
Loss Contingencies [Line Items]
Litigation Settlement, Amount Awarded from Other Party	$ 97,500	$ 62,200
Revenues			99,900	55,800	99,900	55,800
Interest income			7,200	$ 6,400	7,200	$ 6,400
Unfavorable Regulatory Action [Member]
Loss Contingencies [Line Items]
U.S. government contract-related reserves			$ 15,600		$ 15,600		$ 12,900