Quarterly report pursuant to Section 13 or 15(d)

Credit facility and commercial paper notes - Additional Information (Details)

v3.24.2.u1
Credit facility and commercial paper notes - Additional Information (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2024
Dec. 31, 2023
Line of Credit Facility [Line Items]      
Credit facilities $ 316,589,000 $ 316,589,000 $ 400,861,000
Credit facilities | Unsecured Revolving Credit Facility, Maturing February 2025      
Line of Credit Facility [Line Items]      
Principal amount 1,250,000,000 1,250,000,000  
Outstanding credit facility $ 317,000,000 $ 317,000,000  
Effective interest rate (as a percent) 7.01% 7.01%  
Unamortized debt issuance costs $ 10,000,000 $ 10,000,000  
Term loan fee (as a percent)   1.625%  
Credit facilities | Unsecured Revolving Credit Facility, Maturing February 2025 | SOFR      
Line of Credit Facility [Line Items]      
Variable rate   1.625%  
Credit facilities | Unsecured Revolving Credit Facility, Maturing February 2025 | Prime Rate      
Line of Credit Facility [Line Items]      
Variable rate   0.625%  
Credit facilities | New Revolving Credit Facility | Additional Variable Rate      
Line of Credit Facility [Line Items]      
Variable rate   0.10%  
Credit facilities | Senior Secured Revolving Credit Agreement | Line of Credit      
Line of Credit Facility [Line Items]      
Principal amount 100,000,000 $ 100,000,000  
Unamortized debt issuance costs 1,000,000 1,000,000  
Credit facilities $ 0 0  
Unused letter of credit capacity (as a percent) 0.20%    
Pledged collateral 80.00%    
Targeted rate reduction 0.10%    
Available amount $ 22,000,000 $ 22,000,000  
Credit facilities | Senior Secured Revolving Credit Agreement | SOFR | Line of Credit      
Line of Credit Facility [Line Items]      
Variable rate 1.90%    
Line of Credit | Unsecured Revolving Credit Facility, Maturing February 2025 | SOFR | Term Loan Facility      
Line of Credit Facility [Line Items]      
Variable rate, maximum downward adjustment (in percent)   0.10%  
Commercial Paper | CarbonCount Green Commercial Paper Note Program      
Line of Credit Facility [Line Items]      
Principal amount $ 125,000,000 $ 125,000,000  
Effective interest rate (as a percent) 6.73% 6.73%  
Grace period (in days)   5 days  
Credit facility remaining no of days (in days)   397 days  
Credit facilities $ 110,000,000 $ 110,000,000  
Broker fee percent (as a percent)   0.0010  
Unamortized financing costs 0 $ 0  
Letter of Credit | CarbonCount Green Commercial Paper Note Program      
Line of Credit Facility [Line Items]      
Principal amount $ 125,000,000 $ 125,000,000  
Percentage of drawn letter of credit (as a percent)   0.01325  
Unused letter of credit capacity (as a percent)   0.40%  
Reduced percentage of letter of credit fee (as a percent)   0.001  
Letter of Credit | CarbonCount Green Commercial Paper Note Program | SOFR | Variable Rate Component One      
Line of Credit Facility [Line Items]      
Variable rate   1.875%  
Letter of Credit | CarbonCount Green Commercial Paper Note Program | SOFR | Variable Rate Component Two      
Line of Credit Facility [Line Items]      
Variable rate   0.10%