Financial Instruments and Fair Value Measurements - Schedule of Derivative Financial Instruments (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021
Derivatives, Fair Value [Line Items]
Fair value, liability derivatives		$ (46)	$ (45,027)
Derivative Asset		54,902	7
Interest Rate Swaps
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount			16,700
Fund III
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount		50,000
Derivative Asset		1,100
Fund V
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount		50,000
Derivative Asset		800
Core Portfolio
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount		856,000
Fair value, derivatives, net		40,838	(40,650)
Core Portfolio | Interest Rate Swaps
Derivatives, Fair Value [Line Items]
Fair value, liability derivatives		$ (46)	$ (40,650)
Derivative Liability, Statement of Financial Position [Extensible Enumeration]		Liabilities	Liabilities
Derivative Asset		$ 40,884	$ 0
Derivative Asset, Statement of Financial Position [Extensible Enumeration]		Assets	Assets
Core Portfolio | Interest Rate Swaps | Other Liabilities
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount		$ 50,000
Core Portfolio | Interest Rate Swaps | Other Assets
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount		$ 806,000
Core Portfolio | Interest Rate Swaps | Minimum | Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative Effective Date		2022-12
Derivative Maturity Date		2029-12
Strike Rate		3.61%
Core Portfolio | Interest Rate Swaps | Minimum | Other Assets
Derivatives, Fair Value [Line Items]
Derivative Effective Date		2015-03
Derivative Maturity Date		2023-03
Strike Rate		2.10%
Core Portfolio | Interest Rate Swaps | Maximum | Other Liabilities
Derivatives, Fair Value [Line Items]
Strike Rate		3.61%
Core Portfolio | Interest Rate Swaps | Maximum | Other Assets
Derivatives, Fair Value [Line Items]
Derivative Effective Date		2022-08
Derivative Maturity Date		2030-07
Strike Rate		3.36%
Fund Portfolio | Fund II | Interest Rate Swaps
Derivatives, Fair Value [Line Items]
Derivative Asset	[1]	$ 1,108	$ 0
Derivative Asset, Statement of Financial Position [Extensible Enumeration]		Assets	Assets
Fund Portfolio | Fund II | Interest Rate Swaps | Other Assets
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount	[1]	$ 0
Derivative Effective Date	[1]	2023-01
Derivative Maturity Date	[1]	2029-12
Fund Portfolio | Fund II | Interest Rate Swaps | Minimum | Other Assets
Derivatives, Fair Value [Line Items]
Strike Rate	[1]	3.23%
Fund Portfolio | Fund II | Interest Rate Swaps | Maximum | Other Assets
Derivatives, Fair Value [Line Items]
Strike Rate	[1]	3.23%
Fund Portfolio | Fund III | Interest Rate Caps
Derivatives, Fair Value [Line Items]
Derivative Asset		$ 232	$ 0
Derivative Asset, Statement of Financial Position [Extensible Enumeration]		Assets	Assets
Fund Portfolio | Fund III | Interest Rate Caps | Other Assets
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount		$ 35,970
Derivative Effective Date		2022-07
Derivative Maturity Date		2023-07
Fund Portfolio | Fund III | Interest Rate Caps | Minimum | Other Assets
Derivatives, Fair Value [Line Items]
Strike Rate		3.50%
Fund Portfolio | Fund III | Interest Rate Caps | Maximum | Other Assets
Derivatives, Fair Value [Line Items]
Strike Rate		3.50%
Fund Portfolio | Fund IV
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount			$ 76,338
Fair value, derivatives, net		$ 1,093	(160)
Fund Portfolio | Fund IV | Interest Rate Swaps
Derivatives, Fair Value [Line Items]
Fair value, liability derivatives			$ (167)
Derivative Liability, Statement of Financial Position [Extensible Enumeration]			Liabilities
Fund Portfolio | Fund IV | Interest Rate Caps
Derivatives, Fair Value [Line Items]
Derivative Asset		$ 1,093	$ 7
Derivative Asset, Statement of Financial Position [Extensible Enumeration]		Assets	Assets
Fund Portfolio | Fund IV | Interest Rate Caps | Other Assets
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount		$ 76,338
Fund Portfolio | Fund IV | Interest Rate Caps | Minimum | Other Assets
Derivatives, Fair Value [Line Items]
Derivative Effective Date		2021-07
Derivative Maturity Date		2023-07
Strike Rate		3.00%
Fund Portfolio | Fund IV | Interest Rate Caps | Maximum | Other Assets
Derivatives, Fair Value [Line Items]
Derivative Effective Date		2022-12
Derivative Maturity Date		2023-12
Strike Rate		3.50%
Fund Portfolio | Fund V
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount		$ 308,014
Fair value, derivatives, net		11,585	$ (4,210)
Fund Portfolio | Fund V | Interest Rate Swaps
Derivatives, Fair Value [Line Items]
Fair value, liability derivatives			$ (4,210)
Derivative Liability, Statement of Financial Position [Extensible Enumeration]			Liabilities
Derivative Asset	[2]	$ 11,585	$ 0
Derivative Asset, Statement of Financial Position [Extensible Enumeration]		Assets	Assets
Fund Portfolio | Fund V | Interest Rate Swaps | Minimum | Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative Effective Date	[2]	2018-06
Derivative Maturity Date	[2]	2023-01
Fund Portfolio | Fund V | Interest Rate Swaps | Minimum | Other Assets
Derivatives, Fair Value [Line Items]
Strike Rate	[2]	0.91%
Fund Portfolio | Fund V | Interest Rate Swaps | Maximum | Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative Effective Date	[2]	2023-01
Derivative Maturity Date	[2]	2027-12
Fund Portfolio | Fund V | Interest Rate Swaps | Maximum | Other Assets
Derivatives, Fair Value [Line Items]
Strike Rate	[2]	3.36%
Fund Portfolio | Fund V | Interest Rate Caps | Other Assets
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount	[2]	$ 308,014

[1] Includes one swap with an aggregate fair value of $1.1 million at December 31, 2022, with a notional value of $50.0 million which was acquired during December 2022 and is not effective until January 2023.

[2] Includes one swap with an aggregate fair value of $0.8 million at December 31, 2022, with a notional value of $50.0 million which was acquired during December 2022 and is not effective until January 2023.