Discontinued Operations - Income (loss) from Discontinued Operations, Net of Tax (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Operating expenses:
Net income (loss) from discontinued operations, net of tax	$ (10,422)	$ 1,302,387	$ 99,191
Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues		247,069	370,456
Operating expenses:
Cost of revenues		157,355	228,847
Other operating expenses		24,062	20,138
Net income (loss) from discontinued operations before income taxes		65,652	121,471
Gain (loss) on disposal of discontinued operations before income taxes, net of costs to sell	(11,000)	1,661,891
(Provision for) benefit from income taxes	578	(425,156)	(22,280)
Net income (loss) from discontinued operations, net of tax	$ (10,422)	$ 1,302,387	$ 99,191