Balance Sheet Components - Operating Lease Right-of-Use Assets, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Mar. 31, 2024
Regulated Operations [Abstract]
Operating lease right-of-use assets	$ 85,166	$ 85,166
Less: accumulated amortization	(40,062)	(36,272)
Operating lease right-of-use assets	$ 45,104	$ 48,894

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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479041/842-20-45-1

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