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Long-Term Debt (Details) - USD ($)
12 Months Ended
Oct. 14, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 16, 2019
Debt Instrument [Line Items]          
Long-term debt, balance   $ 460,000,000 $ 57,772,000    
Debt discount and issuance costs   31,717,000 1,823,000    
Interest expense related to long term debt   11,300,000 11,500,000 $ 17,400,000  
Term Loan Facility          
Debt Instrument [Line Items]          
Maximum borrowing capacity $ 575,000,000        
Debt instrument term 7 years        
Long-term debt, balance   $ 460,000,000.0      
Effective interest rate   4.00%      
Debt discount and issuance costs   $ 31,700,000      
Debt issuance costs and discounts, amortization rate   6.08%      
Term Loan Facility | Base Rate          
Debt Instrument [Line Items]          
Interest rate applicable margin   1.00%      
Minimum allowable variable rate 0.0150        
Minimum annual variable rate 0.0300        
Term Loan Facility | Fed Funds Effective Rate Overnight Index Swap Rate          
Debt Instrument [Line Items]          
Interest rate applicable margin 0.50%        
Term Loan Facility | London Interbank Offered Rate (LIBOR)          
Debt Instrument [Line Items]          
Monthly basis spread on variable rate 1.00%        
Term Loan Facility | Eurodollar          
Debt Instrument [Line Items]          
Minimum allowable variable rate 0.0100        
Minimum annual variable rate 0.0400        
Revolving Credit Facility          
Debt Instrument [Line Items]          
Maximum borrowing capacity $ 150,000,000        
Debt instrument term 5 years        
Long-term debt, balance   $ 0      
Available borrowing capacity   103,400,000      
Prepayment premium 1.00%        
Annual amortization rate 1.00%        
Springing financial maintenance covenant 35.00%        
Net leverage ratio 7.10        
Revolving Credit Facility | Base Rate          
Debt Instrument [Line Items]          
Minimum allowable variable rate 0.0150        
Minimum annual variable rate 0.0225        
Revolving Credit Facility | Fed Funds Effective Rate Overnight Index Swap Rate          
Debt Instrument [Line Items]          
Interest rate applicable margin 0.50%        
Revolving Credit Facility | London Interbank Offered Rate (LIBOR)          
Debt Instrument [Line Items]          
Monthly basis spread on variable rate 1.00%        
Revolving Credit Facility | Eurodollar          
Debt Instrument [Line Items]          
Minimum allowable variable rate 0.0050        
Minimum annual variable rate 0.0325        
Standby Letters of Credit          
Debt Instrument [Line Items]          
Maximum borrowing capacity         $ 100,000,000.0
Letters of credit outstanding   46,600,000 51,000,000.0    
Revolving Loan          
Debt Instrument [Line Items]          
Long-term debt, balance   0 $ 70,000    
Revolving Loan | Line of Credit          
Debt Instrument [Line Items]          
Maximum borrowing capacity   100,000,000.0      
Term Loan Credit and Guarantee Agreement | Secured Debt          
Debt Instrument [Line Items]          
Effective interest rate     8.96%    
Debt discount and issuance costs     $ 1,800,000    
Quarterly installment payments   $ 5,000,000      
Term Loan balance     $ 57,700,000    
Term Loan Credit and Guarantee Agreement | Base Rate | Secured Debt          
Debt Instrument [Line Items]          
Interest rate applicable margin     6.25%