Revenues from Contracts with Customers - Narrative (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Dec. 31, 2021	Dec. 31, 2021 USD ($)
Disaggregation of Revenue [Line Items]
Net commission revenue adjustment from change in estimate		$ (149,174)
Medicare advantage | Senior
Disaggregation of Revenue [Line Items]
Net commission revenue adjustment from change in estimate		$ (145,000)
Medicare advantage | Senior | Fiscal Year 2021
Disaggregation of Revenue [Line Items]
Reduction in commission revenue	0.62
Medicare advantage | Senior | Fiscal Year 2020
Disaggregation of Revenue [Line Items]
Reduction in commission revenue	0.28
Medicare advantage | Senior | Fiscal Year 2019
Disaggregation of Revenue [Line Items]
Reduction in commission revenue	0.08