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Derivatives and Hedging Activities - Derivatives and their location on the condensed consolidated balance sheets (Details) - USD ($)
$ in Millions
Jun. 30, 2021
Dec. 31, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]    
Derivative asset, notional amount $ 17.6 $ 0.0
Derivative liability, notional amount 72.8 61.0
Interest Rate Swap    
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]    
Derivative liability, notional amount, financing component 52.9  
Interest Rate Swap | Derivatives not designated as hedging instruments | Other Noncurrent Assets    
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]    
Derivative asset, notional amount 17.6 0.0
Derivative liability, notional amount 0.0 0.0
Interest Rate Swap | Derivatives not designated as hedging instruments | Other Noncurrent Liabilities    
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]    
Derivative asset, notional amount 0.0 0.0
Derivative liability, notional amount 17.3 0.0
Interest Rate Swap | Derivatives in cash flow hedging relationships | Other Noncurrent Liabilities    
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]    
Derivative asset, notional amount 0.0 0.0
Derivative liability, notional amount $ 55.5 $ 61.0