Share-Based Compensation - Equity-Settled Plans, Narrative (Details) - $ / shares		12 Months Ended
	Feb. 16, 2017	Jun. 30, 2023	Jun. 30, 2017	Jun. 30, 2022	Jun. 30, 2021	Feb. 02, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Company's common stock purchased in aggregate (in shares)		72,000		92,000	178,000
2010 Long-Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum common stock issued under Long-Term Incentive Plan (in shares)						475,000
2017 Long-Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of additional shares authorized		1,052,000	650,000
Maximum common stock issued under Long-Term Incentive Plan (in shares)		4,000,000
Exercise price of outstanding stock options (dollars per share)		$ 4.44
Vesting period		3 years
Company's common stock purchased in aggregate (in shares)		100,000
2017 Long Term Incentive Plan Excluding 2010 Long Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum common stock issued under Long-Term Incentive Plan (in shares)						3,492,000
Contractual term of stock options granted	10 years