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- Summary of Trading Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Mar. 31, 2021
Total Securities
Amortized Cost	$ 106,882
Gross Unrealized Gains	2
Gross Unrealized (Losses)	(1,632)
Fair Value (1)	105,252
Debt Securities - Held-to-Maturity
Amortized Cost		$ 202,145
Gross Unrealized Gains		711
Gross Unrealized (Losses)		(114)
Fair Value		202,742
Corporate debt securities
Debt Securities - Trading
Amortized Cost	88,475
Gross Unrealized Gains	2
Gross Unrealized (Losses)	(1,403)
Fair Value (1)	87,074
Debt Securities - Held-to-Maturity
Amortized Cost		178,384
Gross Unrealized Gains		389
Gross Unrealized (Losses)		(114)
Fair Value		178,659
U.S. treasury securities
Debt Securities - Trading
Amortized Cost	17,891
Gross Unrealized Gains	0
Gross Unrealized (Losses)	(229)
Fair Value (1)	17,662
Debt Securities - Held-to-Maturity
Amortized Cost		23,761
Gross Unrealized Gains		322
Gross Unrealized (Losses)		0
Fair Value		$ 24,083
Certificates of deposit
Equity Method Investment
Amortized Cost	516
Gross Unrealized Gains	0
Gross Unrealized (Losses)	0
Fair Value (1)	$ 516

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