Quarterly report pursuant to Section 13 or 15(d)

Debt - Fair value (Details)

v3.21.1
Debt - Fair value (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Debt Disclosure [Abstract]    
Interest expense $ 0.8 $ 2.3
November 2019 Notes    
Debt Instrument [Line Items]    
Debt fair value 2.6  
Senior Seller Notes    
Debt Instrument [Line Items]    
Debt fair value 9.5  
Junior Seller Notes    
Debt Instrument [Line Items]    
Debt fair value 4.7  
ABG Notes    
Debt Instrument [Line Items]    
Debt fair value 0.6  
June 2020 Notes    
Debt Instrument [Line Items]    
Debt fair value $ 1.3