Summary of Components of Other Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Mar. 31, 2021
Goodwill [Line Items]
Other investments (Note 6)	$ 58,619	$ 62,995
Operating lease right of use asset (Note 11)	9,069	6,109
Other intangible assets and other assets	6,341	5,323
Other assets	126,949	113,082
Shockwave Medical
Goodwill [Line Items]
Fair value of investment	$ 52,920	$ 38,655