Revenues from Contracts with Customers - Commission Receivable Roll Forward (Details) $ in Thousands	6 Months Ended
	Dec. 31, 2021 USD ($)
Activity in Commissions Receivable [Roll Forward]
Beginning balance	$ 845,897
Commission revenue from revenue recognized	212,976
Net commission revenue adjustment from change in estimate	(149,174)
Amounts recognized as accounts receivable	(23,894)
Ending balance	$ 885,805