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Debt - Unsecured Debt - Additional Information (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Debt Instrument [Line Items]    
Maximum borrowing capacity $ 900,000  
Long-term debt outstanding [1],[2] 1,734,463 $ 1,881,087
Letters of credit, outstanding amount 2,000 2,000
$400 Million Term Loan | Unsecured Debt    
Debt Instrument [Line Items]    
Maximum borrowing capacity 400,000  
Senior Unsecured Credit Facility | Unsecured Debt    
Debt Instrument [Line Items]    
Maximum borrowing capacity 700,000  
Fund V [Member] | Fund Portfolio [Member] | Subscription Line | Unsecured Debt    
Debt Instrument [Line Items]    
Long-term debt outstanding [3] 0 80,600
Revolving Credit Facility | Unsecured Debt    
Debt Instrument [Line Items]    
Maximum borrowing capacity $ 300,000  
Basis spread on variable rate 1.45%  
Maturity date Jun. 29, 2025  
Long-term debt outstanding $ 114,700 213,300
Letters of credit, outstanding amount   0
Total available credit $ 185,300 $ 86,700
Term Loan | Unsecured Debt    
Debt Instrument [Line Items]    
Basis spread on variable rate 1.60%  
Maturity date Jun. 29, 2026  
Term Loan | $175 Million Term Loan    
Debt Instrument [Line Items]    
Maximum borrowing capacity $ 175,000  
Basis spread on variable rate 1.60%  
Maturity date Apr. 06, 2027  
Term Loan | $75 million Term Loan    
Debt Instrument [Line Items]    
Maximum borrowing capacity $ 75,000  
Basis spread on variable rate 1.95%  
Maturity date Jul. 29, 2029  
[1] Includes $151.3 million and $151.4 million, respectively, of variable-rate debt that is subject to interest cap agreements as of the periods presented. The effective fixed rates ranged from 4.50% to 6.00%.
[2] Includes $1,207.6 million and $1,249.8 million, respectively, of variable-rate debt that has been fixed with interest rate swap agreements as of the periods presented. The effective fixed rates ranged from 1.14% to 4.69%.
[3] Fund V paid off the subscription line and terminated the outstanding letters of credit during the three months ended March 31, 2024.