XML 74 R63.htm IDEA: XBRL DOCUMENT v3.21.1
Debt and Credit Arrangements - Senior Secured Revolving Credit Facility and Term Loan (Details) - Revolving Credit Facility - USD ($)
3 Months Ended
Apr. 20, 2020
Jun. 14, 2019
Mar. 31, 2021
Dec. 31, 2020
Credit Facilities 2019        
Debt Instrument        
Maximum percentage of capital stock guaranteed by company     65.00%  
Unamortized debt issuance costs     $ 4,700,000 $ 5,000,000.0
Credit Facilities 2019 | Adjusted Base Rate | Minimum        
Debt Instrument        
Debt instrument variable interest rate (percent)   0.25%    
Credit Facilities 2019 | Adjusted Base Rate | Maximum        
Debt Instrument        
Debt instrument variable interest rate (percent)   1.50%    
Credit Facilities 2019 | LIBOR | Minimum        
Debt Instrument        
Debt instrument variable interest rate (percent)   1.25%    
Credit Facilities 2019 | LIBOR | Maximum        
Debt Instrument        
Debt instrument variable interest rate (percent)   2.50%    
Senior secured revolving credit facility        
Debt Instrument        
Maximum borrowing capacity   $ 550,000,000.0    
Payments for debt issuance costs $ 1,900,000   11,900,000  
Unamortized debt issuance costs     7,300,000  
Term loan        
Debt Instrument        
Principal amount   $ 450,000,000.0    
Debt issuance costs     $ 6,100,000  
Debt issuance cost, amortization term     5 years