Debt and Preferred Equity Investments - Schedule of Carrying Value of Debt and Preferred Equity Investment Portfolio by Year of Origination and Risk Rating (Details) $ in Thousands	Mar. 31, 2026 USD ($)	Dec. 31, 2025 USD ($) investment
Financing Receivable, Credit Quality Indicator [Line Items]
Risk Rating, One year	$ 0	$ 0
Risk Rating, Two year	0	0
Risk Rating, Three year	0	0
Risk Rating, Four year	0	0
Risk Rating, Five year	0	0
Risk Rating, Prior year	118,083	168,358
Carrying value	118,083	$ 168,358
Number of investments, nonperforming | investment		1
Carrying Value	118,083	$ 168,358
Alternative Strategy Portfolio | Floating Rate
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying Value		50,300
1 - Low Risk Assets - Low probability of loss
Financing Receivable, Credit Quality Indicator [Line Items]
Risk Rating, One year	0	0
Risk Rating, Two year	0	0
Risk Rating, Three year	0	0
Risk Rating, Four year	0	0
Risk Rating, Five year	0	0
Risk Rating, Prior year	20,000	20,000
Carrying value	20,000	20,000
2 - Watch List Assets - Higher potential for loss
Financing Receivable, Credit Quality Indicator [Line Items]
Risk Rating, One year	0	0
Risk Rating, Two year	0	0
Risk Rating, Three year	0	0
Risk Rating, Four year	0	0
Risk Rating, Five year	0	0
Risk Rating, Prior year	98,083	148,358
Carrying value	98,083	148,358
3 - High Risk Assets - Loss more likely than not
Financing Receivable, Credit Quality Indicator [Line Items]
Risk Rating, One year	0	0
Risk Rating, Two year	0	0
Risk Rating, Three year	0	0
Risk Rating, Four year	0	0
Risk Rating, Five year	0	0
Risk Rating, Prior year	0	0
Carrying value	$ 0	$ 0