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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue Recognition (Details) - USD ($)	3 Months Ended								12 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Derivative Instruments and Hedging Activity
Total revenues	$ 480,907,000	$ 405,406,000	$ 373,235,000	$ 279,210,000	$ 411,870,000	$ 302,889,000	$ 295,597,000	$ 268,071,000	$ 1,538,758,000	$ 1,278,427,000	$ 1,183,236,000
Bill and hold service
Derivative Instruments and Hedging Activity
Total revenues									$ 5,500,000	$ 38,500,000

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