Goodwill and Acquired Intangible Assets - Current and Expected Amortization Expense for Acquired Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Mar. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of acquired intangible assets	$ 91,719	$ 7,433	$ 200,904	$ 22,335
Expected for the remainder of fiscal year 2024	91,395		91,395
Expected for fiscal year 2025	364,819		364,819
Expected for fiscal year 2026	364,667		364,667
Expected for fiscal year 2027	295,938		295,938
Expected for fiscal year 2028	285,005		285,005
Expected for fiscal year 2029	284,260		284,260
Thereafter	1,087,581		1,087,581
Other acquired intangible assets, net	$ 2,773,665		$ 2,773,665		$ 201,205