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Amount of lessee's right to use underlying asset under operating lease.

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Amount of unrealized gain (loss) on investment.

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Other Assets - Additional Information (Detail) - USD ($) $ in Thousands, shares in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Aug. 31, 2022	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Mar. 31, 2022
Goodwill [Line Items]
Investment in Shockwave Medical		$ 46,385		$ 46,385		$ 61,535
Operating lease right of use assets		7,550		7,550		9,518
Shockwave Medical
Goodwill [Line Items]
Aggregate shares sold	0.1
Cash proceeds from sale of stock	$ 40,000
Realized gain from sale of stock	$ 15,200
Investment in Shockwave Medical		46,400		46,400		$ 61,500
Shockwave Medical \| Other Income (Expense)
Goodwill [Line Items]
Unrealized gain (loss) recorded in other income		$ 14,500	$ 4,800	$ 9,700	$ 22,400