Financial Instruments and Fair Value Measurements - Schedule of Derivative Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Dec. 31, 2021
Derivatives, Fair Value [Line Items]
Fair value, liability derivatives	$ (12,750)	$ (45,027)
Derivative Asset	5,279	7
Interest Rate Swaps
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount		16,700
Core Portfolio
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount	501,884
Fair value, derivatives, net	(10,986)	(40,650)
Core Portfolio \| Interest Rate Swaps \| Other Liabilities
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount	385,354
Fair value, liability derivatives	(12,040)	(40,650)
Core Portfolio \| Interest Rate Swaps \| Other Assets
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount	116,530
Derivative Asset	$ 1,054	0
Core Portfolio \| Interest Rate Swaps \| Minimum \| Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative Effective Date	2012-12
Derivative Maturity Date	2022-12
Strike Rate	2.11%
Core Portfolio \| Interest Rate Swaps \| Minimum \| Other Assets
Derivatives, Fair Value [Line Items]
Derivative Effective Date	2015-03
Derivative Maturity Date	2025-03
Strike Rate	1.71%
Core Portfolio \| Interest Rate Swaps \| Maximum \| Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative Effective Date	2020-07
Derivative Maturity Date	2030-07
Strike Rate	3.77%
Core Portfolio \| Interest Rate Swaps \| Maximum \| Other Assets
Derivatives, Fair Value [Line Items]
Derivative Effective Date	2019-06
Derivative Maturity Date	2029-06
Strike Rate	2.40%
Fund Portfolio \| Fund III \| Interest Rate Caps \| Other Assets
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount	$ 35,970
Derivative Effective Date	2021-01
Derivative Maturity Date	2022-07
Derivative Asset	$ 0	0
Fund Portfolio \| Fund III \| Interest Rate Caps \| Minimum \| Other Assets
Derivatives, Fair Value [Line Items]
Strike Rate	3.00%
Fund Portfolio \| Fund III \| Interest Rate Caps \| Maximum \| Other Assets
Derivatives, Fair Value [Line Items]
Strike Rate	3.00%
Fund Portfolio \| Fund IV
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount	$ 83,275
Fair value, derivatives, net	54	(160)
Fund Portfolio \| Fund IV \| Interest Rate Swaps \| Other Liabilities
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount	0
Derivative Asset	0	(167)
Fund Portfolio \| Fund IV \| Interest Rate Swaps \| Other Assets
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount	$ 11,937
Derivative Maturity Date	2022-04
Derivative Asset	$ 0	0
Fund Portfolio \| Fund IV \| Interest Rate Swaps \| Minimum \| Other Assets
Derivatives, Fair Value [Line Items]
Derivative Effective Date	2017-03
Strike Rate	1.97%
Fund Portfolio \| Fund IV \| Interest Rate Swaps \| Maximum \| Other Assets
Derivatives, Fair Value [Line Items]
Derivative Effective Date	2019-01
Strike Rate	2.61%
Fund Portfolio \| Fund IV \| Interest Rate Caps \| Other Assets
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount	$ 71,338
Derivative Asset	$ 54	7
Fund Portfolio \| Fund IV \| Interest Rate Caps \| Minimum \| Other Assets
Derivatives, Fair Value [Line Items]
Derivative Effective Date	2020-12
Derivative Maturity Date	2022-12
Strike Rate	3.00%
Fund Portfolio \| Fund IV \| Interest Rate Caps \| Maximum \| Other Assets
Derivatives, Fair Value [Line Items]
Derivative Effective Date	2021-07
Derivative Maturity Date	2023-07
Strike Rate	3.50%
Fund Portfolio \| Fund V
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount	$ 296,269
Fair value, derivatives, net	3,461	(4,210)
Fund Portfolio \| Fund V \| Interest Rate Swaps \| Other Liabilities
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount	103,274
Fair value, liability derivatives	(710)	(4,210)
Fund Portfolio \| Fund V \| Interest Rate Swaps \| Other Assets
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount	192,995
Derivative Asset	$ 4,171	$ 0
Fund Portfolio \| Fund V \| Interest Rate Swaps \| Minimum \| Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative Effective Date	2018-06
Derivative Maturity Date	2022-10
Strike Rate	1.45%
Fund Portfolio \| Fund V \| Interest Rate Swaps \| Minimum \| Other Assets
Derivatives, Fair Value [Line Items]
Derivative Effective Date	2019-03
Derivative Maturity Date	2023-02
Strike Rate	0.91%
Fund Portfolio \| Fund V \| Interest Rate Swaps \| Maximum \| Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative Effective Date	2019-10
Derivative Maturity Date	2023-06
Strike Rate	2.88%
Fund Portfolio \| Fund V \| Interest Rate Swaps \| Maximum \| Other Assets
Derivatives, Fair Value [Line Items]
Derivative Effective Date	2022-02
Derivative Maturity Date	2024-10
Strike Rate	1.28%

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Fair value of the assets less the liabilities of a derivative or group of derivatives.

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- Definition

Nominal or face amount used to calculate payment on derivative.

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- Definition

Variable interest rate in effect as of the balance sheet date related to the interest rate derivative.

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No definition available.

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