Other Assets - Additional Information (Detail) - Shockwave Medical - USD ($) $ in Thousands	3 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2021
Goodwill [Line Items]
Fair value of investment	$ 56,303		$ 38,655
Other Income (Expense)
Goodwill [Line Items]
Unrealized gain (loss) recorded in other income	$ 17,600	$ 23,800

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

Name:	us-gaap_InvestmentsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant