Stock-Based Compensation - Restricted Stock Units (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Nonvested deferred share activity
Nonvested shares at June 30, 2022	1,465,788
Shares cancelled	(214,017)
Nonvested shares at June 30, 2023	1,774,949	1,465,788
Weighted average grant date fair value per share at June 30, 2022	$ 14.86
Weighted average grant date fair value per share granted	7.04
Weighted average grant date fair value per share vested and released	14.19
Weighted average grant date fair value per share cancelled	21.89
Weighted average grant date fair value per share at June 30, 2023	$ 10.66	$ 14.86
Share based compensation arrangement by share based payment award deferred cancellations in period.		242,743	119,904
Share Based Compensation Arrangement By Share Based Payment Award Deferred Shares Cancelled Weighted Average Grant Date Fair Value		$ 25.50	$ 20.67
Stock Issued During Period, Value, Restricted Stock Award, Gross	$ 1.5	$ 2.6	$ 2.3
Restricted Stock or Unit Expense	1.3	$ 0.6	$ 1.0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding	$ 1.7
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	214,017
Cash Performance Awards
Nonvested deferred share activity
Shares granted	251,575	231,219	238,848
Shares vested and released	(106,637)	(53,333)
Shares cancelled	(13,621)	(25,355)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	251,575	231,219	238,848
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	106,637	53,333
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	$ 1.1	$ 0.5
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	13,621	25,355
Restricted Stock Award, Forfeitures	$ 0.1	$ 0.3
Share Based Performance Awards
Nonvested deferred share activity
Shares granted	782,707
Shares vested and released	(259,529)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	782,707
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	259,529