Derivative Instruments and Hedging Transactions - Summary of Aggregate Gross and Net Derivative Receivables and Payables Balances (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Jun. 30, 2025
Nettable derivative assets:
Gross derivative receivable	$ 964,934	$ 135,340
Amounts Netted	(17,273)	(825)
Cash Collateral Pledge	0	0
Net Derivative	947,661	134,515
Nettable derivative liabilities:
Gross derivative payable	377,448	71,407
Amounts Netted	(10,111)	(2,675)
Cash Collateral Pledge	(29,114)	27,445
Net derivative payables	338,223	96,177
Open sale and purchase commitments
Nettable derivative assets:
Gross derivative receivable	952,738	130,609
Amounts Netted	(17,273)	(825)
Cash Collateral Pledge	0	0
Net Derivative	935,465	129,784
Nettable derivative liabilities:
Gross derivative payable	74,983	18,170
Amounts Netted	(10,111)	(2,675)
Cash Collateral Pledge	0	0
Net derivative payables	64,872	15,495
Liability on margin accounts
Nettable derivative liabilities:
Gross derivative payable	43,460	(23,276)
Amounts Netted	0	0
Cash Collateral Pledge	(29,114)	27,445
Net derivative payables	14,346	4,169
Futures contracts
Nettable derivative assets:
Gross derivative receivable	89	4,326
Amounts Netted	0	0
Cash Collateral Pledge	0	0
Net Derivative	89	4,326
Nettable derivative liabilities:
Gross derivative payable	122,225	109
Amounts Netted	0	0
Cash Collateral Pledge	0	0
Net derivative payables	122,225	109
Forward contracts
Nettable derivative assets:
Gross derivative receivable	12,107	405
Amounts Netted	0	0
Cash Collateral Pledge	0	0
Net Derivative	12,107	405
Nettable derivative liabilities:
Gross derivative payable	136,780	76,404
Amounts Netted	0	0
Cash Collateral Pledge	0	0
Net derivative payables	$ 136,780	$ 76,404