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- Summary of Trading Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Mar. 31, 2024
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 195,301
Gross Unrealized Gains	644
Gross Unrealized (Losses)	(321)
Fair Value	195,624
Amortized Cost		$ 38,920
Gross Unrealized Gains		118
Gross Unrealized (Losses)		(1,033)
Fair Value		38,005
Corporate debt securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	177,687
Gross Unrealized Gains	627
Gross Unrealized (Losses)	(164)
Fair Value	178,150
Amortized Cost		22,318
Gross Unrealized Gains		8
Gross Unrealized (Losses)		(685)
Fair Value		21,641
U.S. treasury securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	17,044
Gross Unrealized Gains	17
Gross Unrealized (Losses)	(157)
Fair Value	16,904
Amortized Cost		16,071
Gross Unrealized Gains		110
Gross Unrealized (Losses)		(348)
Fair Value		15,833
Common stock
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	21
Gross Unrealized Gains	0
Gross Unrealized (Losses)	0
Fair Value	21
Certificates of deposit
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	549	531
Gross Unrealized Gains	0	0
Gross Unrealized (Losses)	0	0
Fair Value	$ 549	$ 531

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