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Long-Term Debt - Senior Credit Facility (Details)
12 Months Ended
Oct. 18, 2019
USD ($)
Dec. 31, 2020
USD ($)
May 07, 2020
Dec. 31, 2019
USD ($)
Senior Credit Facility        
Line of Credit Facility [Line Items]        
Maximum borrowing capacity under credit facility $ 1,800,000,000      
Additional maturity period extended 1 year      
Commitment fee percentage   0.11%    
Unamortized financing costs $ 3,405,000      
Utilized borrowings under credit facility   $ 787,000    
Available amount under credit facility   1,799,213,000    
Senior Credit Facility | Minimum        
Line of Credit Facility [Line Items]        
Commitment fee percentage 0.09%      
Consolidated interest coverage ratio 3.00      
Senior Credit Facility | Maximum        
Line of Credit Facility [Line Items]        
Commitment fee percentage 0.20%      
Consolidated net leverage ratio 3.75   4.75  
Senior Credit Facility | Borrowings        
Line of Credit Facility [Line Items]        
Utilized borrowings under credit facility   0    
Senior Credit Facility | Standby letters of credit related to various insurance contracts and foreign vendor commitments        
Line of Credit Facility [Line Items]        
Utilized borrowings under credit facility   $ 787,000    
Senior Credit Facility | London Interbank Offered Rate (LIBOR)        
Line of Credit Facility [Line Items]        
Basis spread on debt instrument   1.125%    
Senior Credit Facility | London Interbank Offered Rate (LIBOR) | Minimum        
Line of Credit Facility [Line Items]        
Basis spread on debt instrument 1.00%      
Senior Credit Facility | London Interbank Offered Rate (LIBOR) | Maximum        
Line of Credit Facility [Line Items]        
Basis spread on debt instrument 1.75%      
Senior Credit Facility | Federal Funds Effective Swap Rate        
Line of Credit Facility [Line Items]        
Basis spread on debt instrument 0.50%      
Senior Credit Facility | Monthly LIBOR        
Line of Credit Facility [Line Items]        
Basis spread on debt instrument 1.00% 0.125%    
Senior Credit Facility | Monthly LIBOR | Minimum        
Line of Credit Facility [Line Items]        
Basis spread on debt instrument 0.00%      
Senior Credit Facility | Monthly LIBOR | Maximum        
Line of Credit Facility [Line Items]        
Basis spread on debt instrument 0.75%      
2019 Senior Secured Credit Facility Amendment        
Line of Credit Facility [Line Items]        
Unamortized financing costs       $ 2,264,000