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Derivative Instruments and Hedging Activities - Summary of gains and losses recorded on the consolidated statements of operations for the entity's derivatives (Details) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2026	May 31, 2025	May 31, 2024
Derivative [Line Items]
Derivative forward value gains (losses)	$ 18,213	$ (105,070)	$ 264,871
Derivative gains (losses)	82,166	(5,851)	392,037
Interest rate swaps
Derivative [Line Items]
Derivative cash settlements interest income	63,953	99,219	127,166
Derivative forward value gains (losses)	18,213	(105,070)	264,871
Derivative gains (losses)	82,166	$ (5,851)	$ 392,037
Notional amount, terminated	$ 300,000

The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

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