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Stock-Based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
RSUs
Stock-Based Compensation
Stock-based Compensation Expense	$ 1.2	$ 1.3
Associated tax benefit from stock-based compensation expense	0.3	0.3
Unrecognized compensation expense	$ 7.8
Period for unrecognized compensation expense expected to be recognized	2 years 11 months 23 days
Employee Stock Option
Stock-Based Compensation
Stock-based Compensation Expense	$ 0.1	0.2
Unrecognized compensation expense	0.0
Stock Appreciation Rights (SARs) [Member]
Stock-Based Compensation
Stock-based Compensation Expense	$ 1.2	3.5
Period for unrecognized compensation expense expected to be recognized	3 days
PSUs
Stock-Based Compensation
Stock-based Compensation Expense	$ 0.4	0.7
Associated tax benefit from stock-based compensation expense	0.2	0.2
Unrecognized compensation expense	$ 5.0
Period for unrecognized compensation expense expected to be recognized	2 years 29 days
Maximum | Employee Stock Option
Stock-Based Compensation
Associated tax benefit from stock-based compensation expense	$ 0.1	$ 0.1
Maximum | Stock Appreciation Rights (SARs) [Member]
Stock-Based Compensation
Unrecognized compensation expense	$ 0.1

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