Debt - Unsecured Debt - Additional Information (Details) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2024	Apr. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Long-term debt outstanding	[1],[2]	$ 1,707,658		$ 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
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]
Basis spread on variable rate		1.35%
Maturity date		Apr. 15, 2028
Long-term debt outstanding		$ 96,400		213,300
Letters of credit, outstanding amount				0
Total available credit		$ 253,600		$ 86,700
Term Loan | Unsecured Debt
Debt Instrument [Line Items]
Basis spread on variable rate		1.50%
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
Letter of Credit
Debt Instrument [Line Items]
Total available credit			60,000
Amended Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity			900,000
Amended Credit Facility | Maximum | Unsecured Debt
Debt Instrument [Line Items]
Total available credit			350,000
Amended Credit Facility | Minimum | Unsecured Debt
Debt Instrument [Line Items]
Total available credit			$ 300,000

[1] Includes $151.2 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 $1,188.3 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 six months ended June 30, 2024.