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Long-Term Debt (Tables)
12 Months Ended
Dec. 31, 2020
Debt Disclosure [Abstract]  
Schedule of Long-Term Debt
Long-term debt consists of the following:
 
(in millions)
  
2020
    
2019
 
Revolving credit facility
   $ 0.0      $ 60.0  
Term loan
     0.0        0.0  
Deferred finance costs
     0.0        (1.4
    
 
 
    
 
 
 
       0.0        58.6  
Less current portion
     0.0        0.0  
    
 
 
    
 
 
 
     $ 0.0      $ 58.6  
    
 
 
    
 
 
 
Summary of Debt Refinancing Costs
 
(in millions)
  
2020
    
2019
 
Gross cost at January 1
   $ 1.5      $ 2.7  
Capitalized in the year
     0.3        1.5  
Written down in the year
     0.0        (2.7
    
 
 
    
 
 
 
       1.8        1.5  
    
 
 
    
 
 
 
Accumulated amortization at January 1
   $ (0.1    $ (1.8
Amortization in the year
     (0.4      (1.0
Amortization written down in the year
     0.0        2.7  
    
 
 
    
 
 
 
     $ (0.5    $ (0.1
    
 
 
    
 
 
 
Net book value at December 31
   $ 1.3      $ 1.4