XML 88 R73.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Long-term Debt - Additional Information (Details)
$ in Millions
3 Months Ended 12 Months Ended
Oct. 12, 2016
Mar. 31, 2018
USD ($)
Dec. 31, 2019
USD ($)
Lender
Mar. 31, 2019
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Long-term debt            
Number of lender holding percentage of outstanding amount | Lender     1      
Percentage of outstanding principal amount held by lender     1.00%      
Unamortized deferred financing costs at period end     $ 0.6      
Original issue discount     1.5      
Amortization of offering costs and discount     $ 0.7   $ 0.7 $ 0.8
Interest Expense            
Long-term debt            
Refinancing charges   $ 2.3        
Minimum            
Long-term debt            
Threshold percentage comparing present value of remaining cash flows     10.00%      
2023 Term Loans            
Long-term debt            
Due date of loan       Mar. 26, 2023    
Variable interest rate base     LIBOR      
Incremental capacity     $ 175.0      
Term Loan B-1            
Long-term debt            
Due date of loan Sep. 25, 2021          
LIBOR | 2023 Term Loans            
Long-term debt            
Interest rate added to base rate (as a percent)       2.25%    
Interest rate, variable interest rate floor (as a percent)       0.00%    
LIBOR | Term Loan B-1            
Long-term debt            
Interest rate added to base rate (as a percent) 2.75%          
Interest rate, variable interest rate floor (as a percent) 0.75%