Goodwill and Intangible Assets - Summary of Changes in Carrying Amounts of Goodwill (Details) $ in Thousands	9 Months Ended
Mar. 31, 2026 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Beginning Balance	$ 228,650
Goodwill acquired - Monex	15,039
Other	46
Ending balance	$ 243,735

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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+ Details