Fair Value Measurement - Schedule of fair value, assets and liabilities measured on recurring basis (Details) - USD ($) $ in Thousands	May 31, 2026	May 31, 2025
Assets:
Equity securities, at fair value	$ 11,021	$ 11,252
Debt securities trading, at fair value	31,144	113,663
Deferred compensation investments	9,011	8,019
Derivative assets	554,116	555,855
Liabilities:
Derivative liabilities	31,414	51,368
Deferred compensation liability	9,011	8,019
Level 1
Assets:
Equity securities, at fair value	11,021	11,252
Debt securities trading, at fair value	0	0
Deferred compensation investments	9,011	8,019
Derivative assets	0	0
Liabilities:
Derivative liabilities	0	0
Deferred compensation liability	9,011	8,019
Level 2
Assets:
Equity securities, at fair value	0	0
Debt securities trading, at fair value	31,144	113,663
Deferred compensation investments	0	0
Derivative assets	554,116	555,855
Liabilities:
Derivative liabilities	31,414	51,368
Deferred compensation liability	0	0
Recurring basis
Assets:
Equity securities, at fair value	11,021	11,252
Debt securities trading, at fair value	31,144	113,663
Deferred compensation investments	9,011	8,019
Derivative assets	554,116	555,855
Liabilities:
Derivative liabilities	31,414	51,368
Deferred compensation liability	9,011	8,019
Recurring basis | Level 1
Assets:
Equity securities, at fair value	11,021	11,252
Debt securities trading, at fair value	0	0
Deferred compensation investments	9,011	8,019
Derivative assets	0	0
Liabilities:
Derivative liabilities	0	0
Deferred compensation liability	9,011	8,019
Recurring basis | Level 2
Assets:
Equity securities, at fair value	0	0
Debt securities trading, at fair value	31,144	113,663
Deferred compensation investments	0	0
Derivative assets	554,116	555,855
Liabilities:
Derivative liabilities	31,414	51,368
Deferred compensation liability	$ 0	$ 0