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- Summary of Trading Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Mar. 31, 2022
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 39,622	$ 106,882
Gross Unrealized Gains	21	2
Gross Unrealized (Losses)	(2,334)	(1,632)
Fair Value (1)	37,309	105,252
Corporate debt securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	24,936	88,475
Gross Unrealized Gains	6	2
Gross Unrealized (Losses)	(1,325)	(1,403)
Fair Value (1)	23,617	87,074
U.S. treasury securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	13,400	17,891
Gross Unrealized Gains	15	0
Gross Unrealized (Losses)	(425)	(229)
Fair Value (1)	12,990	17,662
Common stock
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	768
Gross Unrealized Gains	0
Gross Unrealized (Losses)	(584)
Fair Value (1)	184
Certificates of deposit
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	518	516
Gross Unrealized Gains	0	0
Gross Unrealized (Losses)	0	0
Fair Value (1)	$ 518	$ 516