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Long-Term Debt - Narrative (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Jun. 30, 2018
Debt Instrument [Line Items]      
Interest Rate 3.52% 4.25%  
2018 Term Loan A | Notes Payable      
Debt Instrument [Line Items]      
New term loan     $ 425,000,000
2018 Term Loan A | Notes Payable | LIBOR      
Debt Instrument [Line Items]      
Spread on variable rate 1.625%    
2018 Term Loan A | Notes Payable | Prime lending rate      
Debt Instrument [Line Items]      
Spread on variable rate 0.625%    
2018 Revolver | Revolving Credit Facility      
Debt Instrument [Line Items]      
Revolving credit facility amount $ 250,000,000    
Letters of credit outstanding 16,000,000    
Unused portion of credit facility 234,000,000    
2018 Revolver | Swingline loan | Revolving Credit Facility      
Debt Instrument [Line Items]      
Revolving credit facility amount $ 20,000,000