STATEMENTS OF CONSOLIDATED STOCKHOLDERS' EQUITY - USD ($) $ in Millions		Total	Common Stock	Additional Paid In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive (Loss) Income
Beginning balance at Dec. 31, 2021		$ 692.5	$ 0.2	$ 1,078.9	$ 93.0	$ (475.9)	$ (3.7)
Beginning balance (shares) at Dec. 31, 2021			15,865,118
Net Income (Loss)		(29.6)			(29.6)
Other comprehensive income, net of tax		6.9					6.9
Common shares issued (including impacts from Long-Term Incentive programs)		0.6		0.6
Common shares issued (including impacts from Long-Term Incentive programs) (shares)			107,494
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares/common shares issued		(2.8)		(2.8)
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares/common shares issued (shares)			(31,856)
Cash dividends declared	[1]	(50.1)			(50.1)
Amortization of unearned equity compensation		13.7		13.7
Ending balance at Dec. 31, 2022		631.2	$ 0.2	1,090.4	13.3	(475.9)	3.2
Ending balance (shares) at Dec. 31, 2022			15,940,756
Net Income (Loss)		47.2			47.2
Other comprehensive income, net of tax		9.9					9.9
Common shares issued (including impacts from Long-Term Incentive programs)		0.7		0.7
Common shares issued (including impacts from Long-Term Incentive programs) (shares)			98,292
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares/common shares issued		(1.8)		(1.8)
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares/common shares issued (shares)			(23,257)
Cash dividends declared	[1]	(50.4)			(50.4)
Amortization of unearned equity compensation		15.4		15.4
Ending balance at Dec. 31, 2023		$ 652.2	$ 0.2	1,104.7	10.1	(475.9)	13.1
Ending balance (shares) at Dec. 31, 2023		16,015,791	16,015,791
Net Income (Loss)		$ 46.8			46.8
Other comprehensive income, net of tax		7.4					7.4
Common shares issued (including impacts from Long-Term Incentive programs)		0.6		0.6
Common shares issued (including impacts from Long-Term Incentive programs) (shares)			107,017
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares/common shares issued		(2.1)		(2.1)
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares/common shares issued (shares)			(26,910)
Cash dividends declared	[1]	(50.7)			(50.7)
Amortization of unearned equity compensation		13.8		13.8
Ending balance at Dec. 31, 2024		$ 668.0	$ 0.2	$ 1,117.0	$ 6.2	$ (475.9)	$ 20.5
Ending balance (shares) at Dec. 31, 2024		16,095,898	16,095,898

[1] Dividends declared per common share were $3.08 for each of the years ended December 31, 2024, 2023, and 2022.