Financial Instruments and Fair Value Measurements - Schedule of Derivative Financial Instruments (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Fair value, liability derivatives	$ 0	$ (46)
Derivative Asset	74,479	54,902
Core Portfolio
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount	856,000
Fair value, derivatives, net	60,367	40,838
Core Portfolio | Interest Rate Swaps
Derivatives, Fair Value [Line Items]
Fair value, liability derivatives	$ 0	$ (46)
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Unconsolidated VIE liabilities	Unconsolidated VIE liabilities
Derivative Asset	$ 60,367	$ 40,884
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Total assets	Total assets
Core Portfolio | Interest Rate Swaps | Other Assets
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount	$ 856,000
Core Portfolio | Interest Rate Swaps | Minimum | Other Assets
Derivatives, Fair Value [Line Items]
Derivative Effective Date	2022-05
Derivative Maturity Date	2025-03
Strike Rate	1.98%
Core Portfolio | Interest Rate Swaps | Maximum | Other Assets
Derivatives, Fair Value [Line Items]
Derivative Effective Date	2023-05
Derivative Maturity Date	2030-07
Strike Rate	3.61%
Fund Portfolio | Fund II | Interest Rate Swaps
Derivatives, Fair Value [Line Items]
Derivative Asset	$ 2,678	$ 1,108
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Total assets	Total assets
Fund Portfolio | Fund II | Interest Rate Swaps | Other Assets
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount	$ 50,000
Derivative Effective Date	2023-01
Derivative Maturity Date	2029-12
Fund Portfolio | Fund II | Interest Rate Swaps | Minimum | Other Assets
Derivatives, Fair Value [Line Items]
Strike Rate	3.23%
Fund Portfolio | Fund II | Interest Rate Swaps | Maximum | Other Assets
Derivatives, Fair Value [Line Items]
Strike Rate	3.23%
Fund Portfolio | Fund III | Interest Rate Caps
Derivatives, Fair Value [Line Items]
Derivative Asset	$ 149	$ 232
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Total assets	Total assets
Fund Portfolio | Fund III | Interest Rate Caps | Other Assets
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount	$ 33,000
Derivative Effective Date	2023-09
Derivative Maturity Date	2025-10
Fund Portfolio | Fund III | Interest Rate Caps | Minimum | Other Assets
Derivatives, Fair Value [Line Items]
Strike Rate	5.50%
Fund Portfolio | Fund III | Interest Rate Caps | Maximum | Other Assets
Derivatives, Fair Value [Line Items]
Strike Rate	5.50%
Fund Portfolio | Fund IV | Interest Rate Caps
Derivatives, Fair Value [Line Items]
Derivative Asset	$ 255	$ 1,093
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Total assets	Total assets
Fund Portfolio | Fund IV | Interest Rate Caps | Other Assets
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount	$ 57,000
Fund Portfolio | Fund IV | Interest Rate Caps | Minimum | Other Assets
Derivatives, Fair Value [Line Items]
Derivative Effective Date	2022-12
Derivative Maturity Date	2023-12
Strike Rate	3.00%
Fund Portfolio | Fund IV | Interest Rate Caps | Maximum | Other Assets
Derivatives, Fair Value [Line Items]
Strike Rate	3.00%
Fund Portfolio | Fund V
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount	$ 417,478
Fair value, derivatives, net	11,030	$ 11,585
Fund Portfolio | Fund V | Interest Rate Swaps
Derivatives, Fair Value [Line Items]
Derivative Asset	$ 10,555	$ 11,585
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Total assets	Total assets
Fund Portfolio | Fund V | Interest Rate Swaps | Other Assets
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount	$ 344,890
Fund Portfolio | Fund V | Interest Rate Swaps | Minimum | Other Assets
Derivatives, Fair Value [Line Items]
Derivative Effective Date	2022-04
Derivative Maturity Date	2024-03
Strike Rate	1.14%
Fund Portfolio | Fund V | Interest Rate Swaps | Maximum | Other Assets
Derivatives, Fair Value [Line Items]
Derivative Effective Date	2023-07
Derivative Maturity Date	2027-12
Strike Rate	4.54%
Fund Portfolio | Fund V | Interest Rate Caps
Derivatives, Fair Value [Line Items]
Derivative Asset	$ 475	$ 0
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Total assets	Total assets
Fund Portfolio | Fund V | Interest Rate Caps | Other Assets
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount	$ 72,588
Fund Portfolio | Fund V | Interest Rate Caps | Minimum | Other Assets
Derivatives, Fair Value [Line Items]
Derivative Effective Date	2023-01
Derivative Maturity Date	2024-01
Strike Rate	3.64%
Fund Portfolio | Fund V | Interest Rate Caps | Maximum | Other Assets
Derivatives, Fair Value [Line Items]
Derivative Effective Date	2023-08
Derivative Maturity Date	2025-09
Strike Rate	5.00%