Quarterly report pursuant to Section 13 or 15(d)

Debt, Net (Narrative) (Details)

v3.21.2
Debt, Net (Narrative) (Details) - USD ($)
3 Months Ended 9 Months Ended
Aug. 11, 2021
Mar. 11, 2021
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Apr. 12, 2021
Dec. 31, 2020
Debt                
Loss on early extinguishment of debt     $ 1,159,000 $ 3,237,000 $ 59,553,000 $ 3,237,000    
Interest costs capitalized     1,800,000 $ 2,900,000 5,300,000 $ 9,400,000    
2.75% Notes | Unsecured senior notes                
Debt                
Debt instrument, face amount   $ 600,000,000 600,000,000   600,000,000      
Initial offering price   98.95%            
Proceeds from issuance of debt   $ 589,800,000            
Redemption price on or after three months prior to maturity date   100.00%            
Unamortized discount included in carrying value     $ 9,700,000   $ 9,700,000      
Effective interest rate on debt     2.94%   2.94%      
2.75% Notes | Unsecured senior notes | Adjusted Treasury                
Debt                
Basis point used in determining redemption price prior to maturity   0.25%            
2.00% Notes | Unsecured senior notes                
Debt                
Debt instrument, face amount $ 400,000,000   $ 400,000,000   $ 400,000,000      
Initial offering price 99.97%              
Proceeds from issuance of debt $ 397,400,000              
Redemption price on or after three months prior to maturity date 100.00%              
Unamortized discount included in carrying value     $ 2,600,000   $ 2,600,000      
Effective interest rate on debt     2.09%   2.09%      
2.00% Notes | Unsecured senior notes | Adjusted Treasury                
Debt                
Basis point used in determining redemption price prior to maturity 0.20%              
3.60% Senior Notes and 5.25% Senior Notes | Unsecured senior notes                
Debt                
Loss on early extinguishment of debt         $ 58,400,000      
3.60% Senior Notes | Unsecured senior notes                
Debt                
Debt instrument, face amount     $ 350,000,000   350,000,000      
Unamortized discount included in carrying value               $ 781,000
Effective interest rate on debt               3.70%
Repurchased face amount   $ 184,400,000         $ 165,600,000  
Repurchase face amount including accrued interest   196,700,000         176,300,000  
5.250% Senior Notes | Unsecured senior notes                
Debt                
Debt instrument, face amount     $ 250,000,000   $ 250,000,000      
Unamortized discount included in carrying value               $ 1,600,000
Effective interest rate on debt               5.49%
Repurchased face amount   145,600,000         104,400,000  
Repurchase face amount including accrued interest   $ 164,700,000         $ 117,700,000  
Term Loan Facility                
Debt                
Repayments of long-term debt $ 100,000,000