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Segment Information - Summary of Net Sales, Operating Income (Loss), and Total Assets by Segment (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Segment Reporting Information [Line Items]      
Total net sales $ 424.9 $ 385.5  
Operating Income (Loss) 54.3 39.5  
Interest expense, net 3.2 4.7  
Other expense, net 0.2 0.1  
Income before income taxes 50.9 34.7  
Total assets 1,651.4   $ 1,620.5
Environmental Solutions      
Segment Reporting Information [Line Items]      
Total net sales 354.0 318.8  
Operating Income (Loss) 51.7 37.6  
Environmental Solutions | Continuing Operations      
Segment Reporting Information [Line Items]      
Total assets 1,322.0   1,290.9
Safety and Security Systems      
Segment Reporting Information [Line Items]      
Total net sales 70.9 66.7  
Operating Income (Loss) 13.8 12.1  
Safety and Security Systems | Continuing Operations      
Segment Reporting Information [Line Items]      
Total assets 287.3   288.1
Corporate And Eliminations      
Segment Reporting Information [Line Items]      
Operating Income (Loss) (11.2) $ (10.2)  
Corporate And Eliminations | Continuing Operations      
Segment Reporting Information [Line Items]      
Total assets $ 42.1   $ 41.5