Investments in Debt Securities and Notes Receivable - Schedule (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Schedule of Held-to-maturity Securities [Line Items]
Dividends and Interest Receivable	$ 10,042	$ 66,170
Investments in debt securities and notes receivable	904,769	858,049
Notes Receivable - Bridge Loans
Schedule of Held-to-maturity Securities [Line Items]
Notes receivable	594,727	491,879
NexPoint Preferred Stock
Schedule of Held-to-maturity Securities [Line Items]
Debt securities - Preferred Stock	$ 300,000	$ 300,000