Derivative Instruments and Hedging Activities - Schedule of Fair Values and Notional Amounts of Outstanding Derivatives (Details) - USD ($) $ in Thousands	Aug. 31, 2026	May 31, 2026
Derivative assets:
Fair Value	$ 637,736	$ 554,116
Notional Amount	5,475,490	5,550,124
Derivative liabilities:
Fair Value	32,448	31,414
Notional Amount	1,127,343	1,015,409
Interest rate swaps
Derivative assets:
Fair Value	637,736	554,116
Notional Amount	5,475,490	5,550,124
Derivative liabilities:
Fair Value	32,448	31,414
Notional Amount	$ 1,127,343	1,015,409
Forward pay-fixed swaps
Derivative assets:
Notional Amount		$ 21,000

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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- Definition

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