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Long-Term Debt - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Dec. 21, 2018
Dec. 31, 2018
Jun. 30, 2017
Jun. 30, 2021
Dec. 31, 2020
Sep. 24, 2020
Mar. 31, 2019
Mar. 11, 2019
Jun. 28, 2017
Sep. 18, 2014
Apr. 17, 2014
Debt Instrument [Line Items]                      
Unsecured revolving credit facility       $ 0 $ 0       $ 400,000,000.0   $ 800,000,000.0
Proceeds from issuance of debt   $ 2,800,000                  
Write off of deferred debt issuance cost     $ 200,000                
Debt issuance costs                 $ 1,600,000    
Unsecured term loans       270,000,000.0 290,000,000.0            
Outstanding debt balance       $ 2,062,294,000 2,095,906,000            
Debt instrument, periodic payment, principal $ 250,000,000.0                    
Minimum                      
Debt Instrument [Line Items]                      
Debt instrument, variable interest rate       1.00%              
Maximum                      
Debt Instrument [Line Items]                      
Debt instrument, variable interest rate       1.75%              
Unsecured Senior Notes                      
Debt Instrument [Line Items]                      
Debt instrument, face amount                   $ 500,000,000.0  
Debt instrument interest rate stated percentage           2.375%   4.50%   4.20%  
Outstanding debt balance       $ 500,000,000.0 $ 500,000,000.0 $ 200,000,000.0 $ 350,000,000.0        
4.500% Senior Notes, Semi-Annual Interest Payments, Net of the Unamortized Discount, Balloon Due 2029                      
Debt Instrument [Line Items]                      
Debt instrument interest rate stated percentage       4.50% 4.50%            
Senior notes       $ 350,000,000.0 $ 350,000,000.0     $ 350,000,000.0      
2.375% Senior Notes, Semi-Annual Interest Payments, Net of the Unamortized Discount, Balloon Due 2031                      
Debt Instrument [Line Items]                      
Debt instrument interest rate stated percentage       2.375% 2.375%            
Senior notes       $ 700,000,000.0   $ 700,000,000.0          
Term Loan                      
Debt Instrument [Line Items]                      
Debt instrument, periodic payment, principal   $ 67,500,000                  
Unsecured term loans $ 300,000,000.0     $ 255,000,000.0 $ 270,000,000.0            
Loan repayment term 5 years                    
Term Loan | LIBOR                      
Debt Instrument [Line Items]                      
30-day Adjusted LIBOR Rate       0.125%              
Term Loan | Minimum                      
Debt Instrument [Line Items]                      
Unsecured term loans $ 300,000,000.0                    
Term Loan | Maximum                      
Debt Instrument [Line Items]                      
Unsecured term loans $ 450,000,000.0                    
Revolving Credit Facility                      
Debt Instrument [Line Items]                      
Credit facility, outstanding amount                   $ 475,000,000.0  
Long-term Debt | LIBOR                      
Debt Instrument [Line Items]                      
30-day Adjusted LIBOR Rate       0.125%