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Equity Based Plans, Stock-based Compensation Expense (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Equity Based Plans [Abstract]      
Stock-based compensation expense $ 7.2 $ 7.3 $ 7.8
Compensation not yet recognized $ 9.8    
Weighted average period 1 year 9 months