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Basis of presentation and principles of consolidation (Details)
9 Months Ended
Sep. 30, 2022
USD ($)
segment
Dec. 31, 2021
USD ($)
Debt Instrument [Line Items]    
Long-term debt $ 1,062,300,000 $ 849,600,000
Number of reportable segments | segment 2  
Term Loan    
Debt Instrument [Line Items]    
Long-term debt $ 371,300,000 396,600,000
Senior secured credit agreement - Revolver loan due 2023 | Line of Credit    
Debt Instrument [Line Items]    
Long-term debt $ 238,000,000 $ 0