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Long Term Debt - Credit Facility (Details) - USD ($)
3 Months Ended
Mar. 08, 2019
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
London Interbank Offered Rate | Minimum        
Debt Instrument [Line Items]        
Variable rate   1.00%    
London Interbank Offered Rate | Maximum        
Debt Instrument [Line Items]        
Variable rate   1.25%    
Prime Rate | Minimum        
Debt Instrument [Line Items]        
Variable rate   0.00%    
Prime Rate | Maximum        
Debt Instrument [Line Items]        
Variable rate   0.25%    
Credit Agreement        
Debt Instrument [Line Items]        
Maximum borrowing capacity   $ 300,000,000.0    
Revolving Credit Facility        
Debt Instrument [Line Items]        
Credit agreement, term 5 years      
Maximum borrowing capacity $ 1,250,000,000      
Proceeds from credit facility   700,000,000    
Long-term debt   $ 600,000,000 $ 0  
Weighted average interest rate   3.20% 3.60%  
Commitment fee percentage   0.15%    
Debt financing costs   $ 3,400,000    
Term Loan Facility        
Debt Instrument [Line Items]        
Maximum borrowing capacity 0      
Letter of Credit        
Debt Instrument [Line Items]        
Maximum borrowing capacity $ 50,000,000.0      
Letters of credit outstanding   $ 5,000,000.0 $ 4,600,000 $ 5,000,000.0