Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Segment Reporting [Abstract]
Income Tax Expense (Benefit)	$ 21	$ (6,960)
Segment Reporting Information [Line Items]
Interest income	87,174	51,074
Interest expense	(59,617)	(14,017)
Noninterest Income	51,675	(25,442)
Operating Expenses	37,902	19,567
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	41,330	(7,952)
Earnings (losses) from investments in unconsolidated entities	3,444	(5,506)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	44,753	(6,498)
Net income (loss) attributable to non-controlling interests	720	(420)
Dividends on preferred stock	5,117	3,824
Net income (loss) attributable to common stockholders	38,916	(9,902)
Depreciation	358
Longbridge Segment
Segment Reporting [Abstract]
Income Tax Expense (Benefit)	0
Segment Reporting Information [Line Items]
Interest income	2,893
Interest expense	(4,346)
Noninterest Income	33,398
Operating Expenses	25,447
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	6,498
Earnings (losses) from investments in unconsolidated entities	0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	6,498
Net income (loss) attributable to non-controlling interests	2
Dividends on preferred stock	0
Net income (loss) attributable to common stockholders	6,496
Depreciation	358
Investment Portfolio Segment
Segment Reporting [Abstract]
Income Tax Expense (Benefit)	0	0
Segment Reporting Information [Line Items]
Interest income	82,369	51,054
Interest expense	(52,136)	(12,698)
Noninterest Income	10,929	(21,771)
Operating Expenses	3,505	7,752
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	37,657	8,833
Earnings (losses) from investments in unconsolidated entities	3,444	(5,506)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	41,101	3,327
Net income (loss) attributable to non-controlling interests	238	(298)
Dividends on preferred stock	0	0
Net income (loss) attributable to common stockholders	40,863	3,625
Depreciation	0
Corporate and Other
Segment Reporting [Abstract]
Income Tax Expense (Benefit)	21	(6,960)
Segment Reporting Information [Line Items]
Interest income	1,912	20
Interest expense	(3,135)	(1,319)
Noninterest Income	7,348	(3,671)
Operating Expenses	8,950	11,815
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	(2,825)	(16,785)
Earnings (losses) from investments in unconsolidated entities	0	0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(2,846)	(9,825)
Net income (loss) attributable to non-controlling interests	480	(122)
Dividends on preferred stock	5,117	3,824
Net income (loss) attributable to common stockholders	(8,443)	$ (13,527)
Depreciation	$ 0