Overview and Summary of Significant Accounting Policies - Narrative (Details) interaction in Millions	12 Months Ended
	Jun. 30, 2023 USD ($) segment interaction	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of operating segments | segment	1
Number of reportable segments | segment	1
Number of interactions managed per year | interaction	176
Impairments, property and equipment	$ 0	$ 0	$ 0
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property and equipment, net	Property and equipment, net
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Current maturities of long-term debt	Current maturities of long-term debt
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Total long-term debt, net	Total long-term debt, net
Goodwill impairment charges	$ 0	$ 0	0
Intangible asset impairment	$ 0	0	0
Employer matching contribution, percent of compensation	4.00%
Plan expenses	$ 1,200,000	1,000,000.0	800,000
Defined benefit obligations	1,200,000	800,000
Defined benefit pension costs	$ 400,000	$ 400,000	$ 600,000