Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Number of shares authorized for issuance under share-based payment arrangement.

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Percentage of vesting of award under share-based payment arrangement.

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Note 11. Stock Compensation Plans - Textuals (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2024	Nov. 17, 2023	Oct. 20, 2016
Stock Compensation Plan, Pre-tax Compensation Cost	$ 8.2	$ 6.5	$ 7.2
2023 Equity Incentive Plan [Member]
Stock Compensation Plan, Shares Reserved				2,000,000
2023 Equity Incentive Plan [Member] \| Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	100.00%
Share-based Compensation Arrangements, Grants in Period	121,261
Share-based Compensation Arrangements, Vested in Period, Fair Value	$ 4.3	$ 2.2	$ 1.6
Performance Shares, Shares Vested	182,839	93,870	82,744
Share-based Compensation Arrangements, Grants in Period, Weighted Average Grant Date Fair Value	$ 28.35
2023 Equity Incentive Plan [Member] \| Total Shareholder Return Performance Share
Share-based Compensation Arrangements, Grants in Period	61,286
Performance Shares, Shares Vested	0	0	0
Share-based Compensation Arrangements, Grants in Period, Weighted Average Grant Date Fair Value	$ 48.49
2023 Equity Incentive Plan [Member] \| Unrestricted Shares Director Compensation
Share-based Compensation Arrangements, Grants in Period	20,555	26,192	18,128
Share-based Compensation Arrangements, Vested in Period, Fair Value	$ 0.6	$ 0.5	$ 0.5
Share-based Compensation Arrangements, Grants in Period, Weighted Average Grant Date Fair Value	$ 28.34	$ 19.09	$ 25.24
2023 Equity Incentive Plan [Member] \| Restricted Stock
Share-based Compensation Arrangements, Grants in Period	169,851
Share-based Compensation Arrangements, Vested in Period, Fair Value	$ 4.8	$ 2.9	$ 2.8
Performance Shares, Shares Vested	89,295	46,497	20,768
Share-based Compensation Arrangements, Grants in Period, Weighted Average Grant Date Fair Value	$ 28.35
2023 Equity Incentive Plan [Member] \| Maximum \| Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	125.00%
2023 Equity Incentive Plan [Member] \| Maximum \| Total Shareholder Return Performance Share
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	200.00%
2023 Equity Incentive Plan [Member] \| Minimum \| Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	0.00%
2023 Equity Incentive Plan [Member] \| Minimum \| Total Shareholder Return Performance Share
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	0.00%
Non-Employee Directors Stock Compensation Deferral Plan
Stock Compensation Plan, Shares Reserved					1,000,000.0