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Corporate Indebtedness - Additional Information (Details)
3 Months Ended
Mar. 31, 2021
USD ($)
extension
Dec. 31, 2020
USD ($)
Corporate Indebtedness    
Outstanding under line of credit facility $ 625,809,000 $ 105,262,000
Term Loan B, Maturity November 21, 2024 | Term loan    
Corporate Indebtedness    
Credit facility, maximum borrowing capacity $ 200,000,000.0  
Term Loan B, Maturity November 21, 2024 | LIBOR | Term loan    
Corporate Indebtedness    
Interest rate added to base rate (as a percent) 1.00%  
Term Loan B, Maturity November 21, 2024 | LIBOR | Minimum | Term loan    
Corporate Indebtedness    
Interest rate added to base rate (as a percent) 0.85%  
Term Loan B, Maturity November 21, 2024 | LIBOR | Maximum | Term loan    
Corporate Indebtedness    
Interest rate added to base rate (as a percent) 1.65%  
Revolving credit facility    
Corporate Indebtedness    
Facility fee (as a percent) 0.20%  
Outstanding under line of credit facility $ 630,000,000.0  
Revolving credit facility | Minimum    
Corporate Indebtedness    
Facility fee (as a percent) 0.125%  
Revolving credit facility | Maximum    
Corporate Indebtedness    
Facility fee (as a percent) 0.30%  
Term loan    
Corporate Indebtedness    
Long-term debt, carrying value $ 1,500,000,000  
Term loan | Line of Credit    
Corporate Indebtedness    
Long-term debt, carrying value 1,500,000,000 1,500,000,000
2012 Credit Facility    
Corporate Indebtedness    
Letters of credit 16,500,000  
Ability to borrow under line of credit facility 900,000,000  
2012 Credit Facility | Line of Credit    
Corporate Indebtedness    
Long-term debt, carrying value 625,800,000 $ 105,300,000
Term Loan A, Maturity March 31, 2023 | Term loan    
Corporate Indebtedness    
Credit facility, maximum borrowing capacity $ 1,300,000,000  
Term Loan A, Maturity March 31, 2023 | LIBOR | Term loan    
Corporate Indebtedness    
Interest rate added to base rate (as a percent) 1.10%  
Term Loan A, Maturity March 31, 2023 | LIBOR | Minimum | Term loan    
Corporate Indebtedness    
Interest rate added to base rate (as a percent) 0.90%  
Term Loan A, Maturity March 31, 2023 | LIBOR | Maximum | Term loan    
Corporate Indebtedness    
Interest rate added to base rate (as a percent) 1.75%  
Revolving credit facility | Revolving Credit Facility, Maturity March 31, 2022 | Line of Credit    
Corporate Indebtedness    
Credit facility, maximum borrowing capacity $ 1,500,000,000  
Number of extensions | extension 2  
Term of extension 6 months  
Maximum borrowing capacity, optional expansion $ 4,500,000,000  
Revolving credit facility | Revolving Credit Facility, Maturity March 31, 2022 | LIBOR | Line of Credit    
Corporate Indebtedness    
Interest rate added to base rate (as a percent) 1.00%  
Revolving credit facility | Revolving Credit Facility, Maturity March 31, 2022 | LIBOR | Minimum | Line of Credit    
Corporate Indebtedness    
Interest rate added to base rate (as a percent) 0.825%  
Revolving credit facility | Revolving Credit Facility, Maturity March 31, 2022 | LIBOR | Maximum | Line of Credit    
Corporate Indebtedness    
Interest rate added to base rate (as a percent) 1.55%