Valuation (Significant Unobservable Inputs Rollforward) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) $ / shares	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Fair Value, Measurements, Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 14,282,250	$ 13,357,204
Level 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	12,034,361	2,881,539	$ 1,959,802
Assets, Accreted Discounts/Amortized Premiums	(16,018)	(25,276)	(29,151)
Assets, Realized Gain (Loss)	(42,205)	3,821	13,950
Assets, Change In Net Unrealized Gain/(Loss)	639,790	(248,666)	50,118
Assets, Purchases	3,995,795	11,774,365	2,330,325
Assets, Sales	(3,714,981)	(2,332,198)	(1,423,986)
Assets, Transfers into Level 3	49,829	35,266	13,797
Assets, Transfers out of Level 3	(29,089)	(54,490)	(33,316)
Assets, Ending Balance	12,917,482	12,034,361	2,881,539
Liabilities, Begining Balance	(9,518,871)	(984,168)	(755,405)
Liabilities, Accreted Discounts/Amortized Premiums	(1,088)	(802)	0
Liabilities, Realized Gain/(Loss)	0	0	(1,427)
Liabilities, Change In Net Unrealized Gain/(Loss)	(503,006)	113,924	16,327
Liabilities Purchases/Payments	1,444,351	560,812	585,301
Liabilities, Sales/Issuance	(1,542,054)	(9,208,637)	(828,964)
Liabilities, Transfers into Level 3	0	0	0
Liabilities, Transfers out of Level 3	0	0	0
Liabilities, Ending Balance	(10,120,668)	(9,518,871)	(984,168)
Level 3 | Fair Value, Measurements, Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	12,917,482	12,034,361
Level 3 | Non-Agency RMBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	155,240
Level 3 | Non-Agency RMBS | Valuation, Income Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	72,238
Level 3 | Non-Agency RMBS | Valuation, Market Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 83,002
Level 3 | Non-Agency RMBS | Measurement Input, Quoted Price | Valuation, Market Approach | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input | $ / shares	0.45
Level 3 | Non-Agency RMBS | Measurement Input, Quoted Price | Valuation, Market Approach | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input | $ / shares	187.02
Level 3 | Non-Agency RMBS | Measurement Input, Quoted Price | Valuation, Market Approach | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input | $ / shares	77.42
Level 3 | Non-Agency RMBS | Measurement Input, Discount Rate | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.034
Level 3 | Non-Agency RMBS | Measurement Input, Discount Rate | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.901
Level 3 | Non-Agency RMBS | Measurement Input, Discount Rate | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.129
Level 3 | Non-Agency RMBS | Measurement Input, Prepayment Rate | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.000
Level 3 | Non-Agency RMBS | Measurement Input, Prepayment Rate | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	1.000
Level 3 | Non-Agency RMBS | Measurement Input, Prepayment Rate | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.384
Level 3 | Non-Agency RMBS | Measurement Input, Default Rate | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.000
Level 3 | Non-Agency RMBS | Measurement Input, Default Rate | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.871
Level 3 | Non-Agency RMBS | Measurement Input, Default Rate | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.114
Level 3 | CMBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 14,143
Level 3 | CMBS | Valuation, Income Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	5,711
Level 3 | CMBS | Valuation, Market Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 8,432
Level 3 | CMBS | Measurement Input, Quoted Price | Valuation, Market Approach | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input | $ / shares	4.82
Level 3 | CMBS | Measurement Input, Quoted Price | Valuation, Market Approach | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input | $ / shares	68.00
Level 3 | CMBS | Measurement Input, Quoted Price | Valuation, Market Approach | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input | $ / shares	42.75
Level 3 | CMBS | Measurement Input, Discount Rate | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.062
Level 3 | CMBS | Measurement Input, Discount Rate | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.191
Level 3 | CMBS | Measurement Input, Discount Rate | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.156
Level 3 | CMBS | Measurement Input, Default Rate | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0
Level 3 | CMBS | Measurement Input, Default Rate | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.718
Level 3 | CMBS | Measurement Input, Default Rate | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.064
Level 3 | CLOs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 20,439
Level 3 | CLOs | Valuation, Income Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	6,319
Level 3 | CLOs | Valuation, Market Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 14,120
Level 3 | CLOs | Measurement Input, Quoted Price | Valuation, Market Approach | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input | $ / shares	0.50
Level 3 | CLOs | Measurement Input, Quoted Price | Valuation, Market Approach | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input | $ / shares	98.14
Level 3 | CLOs | Measurement Input, Quoted Price | Valuation, Market Approach | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input | $ / shares	77.09
Level 3 | CLOs | Measurement Input, Discount Rate | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.089
Level 3 | CLOs | Measurement Input, Discount Rate | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.635
Level 3 | CLOs | Measurement Input, Discount Rate | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.199
Level 3 | Asset-backed securities, backed by consumer loans
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 81,922
Level 3 | Asset-backed securities, backed by consumer loans | Valuation, Income Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	74,226
Level 3 | Asset-backed securities, backed by consumer loans | Valuation, Market Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 7,696
Level 3 | Asset-backed securities, backed by consumer loans | Measurement Input, Quoted Price | Valuation, Market Approach | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input | $ / shares	20.50
Level 3 | Asset-backed securities, backed by consumer loans | Measurement Input, Quoted Price | Valuation, Market Approach | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input | $ / shares	72.28
Level 3 | Asset-backed securities, backed by consumer loans | Measurement Input, Quoted Price | Valuation, Market Approach | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input | $ / shares	59.87
Level 3 | Asset-backed securities, backed by consumer loans | Measurement Input, Discount Rate | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.038
Level 3 | Asset-backed securities, backed by consumer loans | Measurement Input, Discount Rate | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.352
Level 3 | Asset-backed securities, backed by consumer loans | Measurement Input, Discount Rate | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.127
Level 3 | Asset-backed securities, backed by consumer loans | Measurement Input, Prepayment Rate | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.000
Level 3 | Asset-backed securities, backed by consumer loans | Measurement Input, Prepayment Rate | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.239
Level 3 | Asset-backed securities, backed by consumer loans | Measurement Input, Prepayment Rate | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.118
Level 3 | Asset-backed securities, backed by consumer loans | Measurement Input, Default Rate | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.009
Level 3 | Asset-backed securities, backed by consumer loans | Measurement Input, Default Rate | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.511
Level 3 | Asset-backed securities, backed by consumer loans | Measurement Input, Default Rate | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.277
Level 3 | Residential mortgage loans | Valuation, Income Approach | Performing Financial Instruments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 1,435,663
Level 3 | Residential mortgage loans | Measurement Input, Discount Rate | Performing Financial Instruments [Member] | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.034
Level 3 | Residential mortgage loans | Measurement Input, Discount Rate | Performing Financial Instruments [Member] | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.379
Level 3 | Residential mortgage loans | Measurement Input, Discount Rate | Performing Financial Instruments [Member] | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.084
Level 3 | Commercial mortgage loans | Valuation, Income Approach | Performing Financial Instruments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 233,281
Level 3 | Commercial mortgage loans | Measurement Input, Discount Rate | Valuation, Income Approach | Performing Financial Instruments [Member] | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.101
Level 3 | Commercial mortgage loans | Measurement Input, Discount Rate | Valuation, Income Approach | Performing Financial Instruments [Member] | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.133
Level 3 | Commercial mortgage loans | Measurement Input, Discount Rate | Valuation, Income Approach | Performing Financial Instruments [Member] | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.117
Level 3 | Consumer loans | Valuation, Income Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 1,759
Level 3 | Consumer loans | Measurement Input, Discount Rate | Valuation, Income Approach | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.088
Level 3 | Consumer loans | Measurement Input, Discount Rate | Valuation, Income Approach | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.145
Level 3 | Consumer loans | Measurement Input, Discount Rate | Valuation, Income Approach | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.113
Level 3 | Consumer loans | Measurement Input, Prepayment Rate | Valuation, Income Approach | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.000
Level 3 | Consumer loans | Measurement Input, Prepayment Rate | Valuation, Income Approach | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.113
Level 3 | Consumer loans | Measurement Input, Prepayment Rate | Valuation, Income Approach | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.062
Level 3 | Consumer loans | Measurement Input, Default Rate | Valuation, Income Approach | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.000
Level 3 | Consumer loans | Measurement Input, Default Rate | Valuation, Income Approach | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.469
Level 3 | Consumer loans | Measurement Input, Default Rate | Valuation, Income Approach | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.167
Level 3 | Corporate loan [Member] | Valuation, Income Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 5,819
Level 3 | Corporate loan [Member] | Measurement Input, Discount Rate | Valuation, Income Approach | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.069
Level 3 | Corporate loan [Member] | Measurement Input, Discount Rate | Valuation, Income Approach | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.372
Level 3 | Corporate loan [Member] | Measurement Input, Discount Rate | Valuation, Income Approach | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.154
Level 3 | Total return swaps | Valuation, Income Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 6
Level 3 | Total return swaps | Measurement Input, Discount Rate | Valuation, Income Approach | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Debt instrument, measurement input	0
Level 3 | Total return swaps | Measurement Input, Discount Rate | Valuation, Income Approach | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Debt instrument, measurement input	0
Level 3 | Total return swaps | Measurement Input, Discount Rate | Valuation, Income Approach | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Debt instrument, measurement input	0
Level 3 | Credit default swaps on asset-backed securities | Valuation, Income Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 8
Level 3 | Other secured borrowings, at fair value | Valuation, Market Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value	$ (1,424,668)
Level 3 | Other secured borrowings, at fair value | Measurement Input, Quoted Price | Valuation, Market Approach | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Debt instrument, measurement input	25.27
Level 3 | Other secured borrowings, at fair value | Measurement Input, Quoted Price | Valuation, Market Approach | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Debt instrument, measurement input	100.46
Level 3 | Other secured borrowings, at fair value | Measurement Input, Quoted Price | Valuation, Market Approach | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Debt instrument, measurement input	86.48
Level 3 | Other secured borrowings, at fair value | Measurement Input, Discount Rate | Valuation, Market Approach | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Debt instrument, measurement input	0.062
Level 3 | Other secured borrowings, at fair value | Measurement Input, Discount Rate | Valuation, Market Approach | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Debt instrument, measurement input	0.097
Level 3 | Other secured borrowings, at fair value | Measurement Input, Discount Rate | Valuation, Market Approach | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Debt instrument, measurement input	0.070
Level 3 | Other secured borrowings, at fair value | Measurement Input, Prepayment Rate | Valuation, Market Approach | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Debt instrument, measurement input	0.996
Level 3 | Other secured borrowings, at fair value | Measurement Input, Prepayment Rate | Valuation, Market Approach | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Debt instrument, measurement input	1.000
Level 3 | Other secured borrowings, at fair value | Measurement Input, Prepayment Rate | Valuation, Market Approach | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Debt instrument, measurement input	1.000
Level 3 | Investment in unconsolidated entities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 116,414
Level 3 | Investment in unconsolidated entities | Measurement Input, Net Asset Value | Enterprise Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	82,964
Level 3 | Investment in unconsolidated entities | Measurement Input, Exercise Price | Valuation, Cost Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	550
Level 3 | HECM loans | Valuation, Income Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 8,591,912
Level 3 | HECM loans | Measurement Input, Discount Rate | Valuation, Income Approach | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.022
Level 3 | HECM loans | Measurement Input, Discount Rate | Valuation, Income Approach | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.066
Level 3 | HECM loans | Measurement Input, Discount Rate | Valuation, Income Approach | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.044
Level 3 | HECM loans | Measurement Input, Prepayment Rate | Valuation, Income Approach | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.019
Level 3 | HECM loans | Measurement Input, Prepayment Rate | Valuation, Income Approach | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.338
Level 3 | HECM loans | Measurement Input, Prepayment Rate | Valuation, Income Approach | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.074
Level 3 | Proprietary reverse mortgage loans | Valuation, Income Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 329,575
Level 3 | Proprietary reverse mortgage loans | Measurement Input, Discount Rate | Valuation, Income Approach | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.073
Level 3 | Proprietary reverse mortgage loans | Measurement Input, Discount Rate | Valuation, Income Approach | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.080
Level 3 | Proprietary reverse mortgage loans | Measurement Input, Discount Rate | Valuation, Income Approach | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.075
Level 3 | Proprietary reverse mortgage loans | Measurement Input, Prepayment Rate | Valuation, Income Approach | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.110
Level 3 | Proprietary reverse mortgage loans | Measurement Input, Prepayment Rate | Valuation, Income Approach | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.371
Level 3 | Proprietary reverse mortgage loans | Measurement Input, Prepayment Rate | Valuation, Income Approach | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loans, Measurement Input	0.150
Level 3 | Mortgage servicing rights | Valuation, Income Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 29,580
Level 3 | Mortgage servicing rights | Measurement Input, Discount Rate | Valuation, Market Approach | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Servicing Asset, Measurement Input	0.174
Level 3 | Mortgage servicing rights | Measurement Input, Discount Rate | Valuation, Market Approach | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Servicing Asset, Measurement Input	0.174
Level 3 | Mortgage servicing rights | Measurement Input, Discount Rate | Valuation, Market Approach | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Servicing Asset, Measurement Input	0.174
Level 3 | Mortgage servicing rights | Measurement Input, Prepayment Rate | Valuation, Market Approach | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Servicing Asset, Measurement Input	0.100
Level 3 | Mortgage servicing rights | Measurement Input, Prepayment Rate | Valuation, Market Approach | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Servicing Asset, Measurement Input	0.371
Level 3 | Mortgage servicing rights | Measurement Input, Prepayment Rate | Valuation, Market Approach | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Servicing Asset, Measurement Input	0.153
Level 3 | Servicing-related asset | Valuation, Income Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 1,327
Level 3 | Servicing-related asset | Measurement Input, Discount Rate | Valuation, Market Approach | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Servicing Asset, Measurement Input	0.150
Level 3 | Servicing-related asset | Measurement Input, Discount Rate | Valuation, Market Approach | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Servicing Asset, Measurement Input	0.150
Level 3 | Servicing-related asset | Measurement Input, Discount Rate | Valuation, Market Approach | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Servicing Asset, Measurement Input	0.150
Level 3 | Loan commitments | Valuation, Income Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 2,584
Level 3 | Loan commitments | Measurement Input pullthrough rate | Valuation, Market Approach | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Servicing Asset, Measurement Input	0.642
Level 3 | Loan commitments | Measurement Input pullthrough rate | Valuation, Market Approach | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Servicing Asset, Measurement Input	1.000
Level 3 | Loan commitments | Measurement Input pullthrough rate | Valuation, Market Approach | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Servicing Asset, Measurement Input	0.729
Level 3 | Loan commitments | measurement input cost to originate loan | Valuation, Market Approach | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Servicing Asset, Measurement Input	0.031
Level 3 | Loan commitments | measurement input cost to originate loan | Valuation, Market Approach | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Servicing Asset, Measurement Input	0.065
Level 3 | Loan commitments | measurement input cost to originate loan | Valuation, Market Approach | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Servicing Asset, Measurement Input	0.049
Level 3 | HMBS-related obligations | Valuation, Market Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value	$ (8,423,235)
Level 3 | HMBS-related obligations | Measurement Input, Discount Rate | Valuation, Market Approach | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Debt instrument, measurement input	0.020
Level 3 | HMBS-related obligations | Measurement Input, Discount Rate | Valuation, Market Approach | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Debt instrument, measurement input	0.065
Level 3 | HMBS-related obligations | Measurement Input, Discount Rate | Valuation, Market Approach | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Debt instrument, measurement input	0.043
Level 3 | HMBS-related obligations | Measurement Input, Prepayment Rate | Valuation, Market Approach | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Debt instrument, measurement input	0.065
Level 3 | HMBS-related obligations | Measurement Input, Prepayment Rate | Valuation, Market Approach | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Debt instrument, measurement input	0.338
Level 3 | HMBS-related obligations | Measurement Input, Prepayment Rate | Valuation, Market Approach | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Debt instrument, measurement input	0.074
Level 3 | Other secured borrowings, at fair value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Liabilities, Begining Balance	$ (1,539,881)	(984,168)	(754,921)
Liabilities, Accreted Discounts/Amortized Premiums	(1,088)	(802)	0
Liabilities, Realized Gain/(Loss)	0	0	0
Liabilities, Change In Net Unrealized Gain/(Loss)	(51,554)	258,140	15,843
Liabilities Purchases/Payments	167,855	312,359	583,874
Liabilities, Sales/Issuance	0	(1,125,410)	(828,964)
Liabilities, Transfers into Level 3	0	0	0
Liabilities, Transfers out of Level 3	0	0	0
Liabilities, Ending Balance	(1,424,668)	(1,539,881)	(984,168)
Change in unrealized gains (losses), liabilities	(51,600)	258,100	15,800
Level 3 | Financial Derivatives - Liabilities | Total return swaps
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Liabilities, Begining Balance		0	(484)
Liabilities, Accreted Discounts/Amortized Premiums			0
Liabilities, Realized Gain/(Loss)			(1,427)
Liabilities, Change In Net Unrealized Gain/(Loss)			484
Liabilities Purchases/Payments			1,427
Liabilities, Sales/Issuance			0
Liabilities, Transfers into Level 3			0
Liabilities, Transfers out of Level 3			0
Liabilities, Ending Balance			0
Level 3 | HMBS-related obligations
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Liabilities, Begining Balance	(7,787,155)	0
Liabilities, Accreted Discounts/Amortized Premiums	0	0
Liabilities, Realized Gain/(Loss)	0	0
Liabilities, Change In Net Unrealized Gain/(Loss)	(451,598)	(162,381)
Liabilities Purchases/Payments	1,276,496	248,453
Liabilities, Sales/Issuance	(1,460,978)	(7,873,227)
Liabilities, Transfers into Level 3	0	0
Liabilities, Transfers out of Level 3	0	0
Liabilities, Ending Balance	(8,423,235)	(7,787,155)	0
Change in unrealized gains (losses), liabilities	(451,600)	(162,400)
Level 3 | Unsecured Borrowings
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Liabilities, Begining Balance	(191,835)	0
Liabilities, Accreted Discounts/Amortized Premiums	0	0
Liabilities, Realized Gain/(Loss)	0	0
Liabilities, Change In Net Unrealized Gain/(Loss)	146	18,165
Liabilities Purchases/Payments	0	0
Liabilities, Sales/Issuance	(81,076)	(210,000)
Liabilities, Transfers into Level 3	0	0
Liabilities, Transfers out of Level 3	0	0
Liabilities, Ending Balance	(272,765)	(191,835)	0
Change in unrealized gains (losses), liabilities	100	18,200
Level 3 | Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Change in unrealized gain (loss), assets	(2,400)	(38,300)	7,000
Level 3 | Securities | Agency RMBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	7,027	9,710	11,663
Assets, Accreted Discounts/Amortized Premiums	(1,302)	(1,963)	(3,565)
Assets, Realized Gain (Loss)	(650)	(130)	882
Assets, Change In Net Unrealized Gain/(Loss)	790	(1,169)	(1,924)
Assets, Purchases	2,877	3,132	2,889
Assets, Sales	(2,490)	(1,442)	(1,533)
Assets, Transfers into Level 3	1,262	3,024	3,683
Assets, Transfers out of Level 3	(2,002)	(4,135)	(2,385)
Assets, Ending Balance	5,512	7,027	9,710
Level 3 | Securities | Non-Agency RMBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	132,502	134,888	127,838
Assets, Accreted Discounts/Amortized Premiums	(140)	993	2,484
Assets, Realized Gain (Loss)	972	37	3,363
Assets, Change In Net Unrealized Gain/(Loss)	(7,677)	(13,934)	(3,735)
Assets, Purchases	42,965	77,994	51,099
Assets, Sales	(41,378)	(35,522)	(49,406)
Assets, Transfers into Level 3	39,295	13,235	8,181
Assets, Transfers out of Level 3	(11,299)	(45,189)	(4,936)
Assets, Ending Balance	155,240	132,502	134,888
Level 3 | Securities | CMBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	12,649	13,134	63,148
Assets, Accreted Discounts/Amortized Premiums	350	120	434
Assets, Realized Gain (Loss)	23	3,050	4,329
Assets, Change In Net Unrealized Gain/(Loss)	(3,589)	(2,807)	5,000
Assets, Purchases	3,441	620	902
Assets, Sales	(459)	(5,297)	(60,449)
Assets, Transfers into Level 3	3,829	3,829	389
Assets, Transfers out of Level 3	2,101	0	619
Assets, Ending Balance	14,143	12,649	13,134
Level 3 | Securities | CLOs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	24,598	26,678	111,100
Assets, Accreted Discounts/Amortized Premiums	(394)	(1,884)	(1,580)
Assets, Realized Gain (Loss)	(8,000)	6,245	935
Assets, Change In Net Unrealized Gain/(Loss)	5,929	(2,825)	18,843
Assets, Purchases	18,597	0	104
Assets, Sales	(12,047)	(13,628)	(78,892)
Assets, Transfers into Level 3	5,443	15,178	1,544
Assets, Transfers out of Level 3	(13,687)	(5,166)	(25,376)
Assets, Ending Balance	20,439	24,598	26,678
Level 3 | Securities | Asset-backed securities, backed by consumer loans
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	73,644	73,108	44,925
Assets, Accreted Discounts/Amortized Premiums	(6,134)	(5,865)	(5,537)
Assets, Realized Gain (Loss)	(19,547)	(36)	(1,881)
Assets, Change In Net Unrealized Gain/(Loss)	3,754	(11,771)	(2,122)
Assets, Purchases	58,212	62,348	77,713
Assets, Sales	(35,703)	(44,140)	(39,990)
Assets, Transfers into Level 3	0	0	0
Assets, Transfers out of Level 3	0	0	0
Assets, Ending Balance	74,226	73,644	73,108
Level 3 | Securities | Corporate debt securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	7,533	5,198	4,082
Assets, Accreted Discounts/Amortized Premiums	0	0	0
Assets, Realized Gain (Loss)	(509)	1,362	1,818
Assets, Change In Net Unrealized Gain/(Loss)	290	(1,514)	212
Assets, Purchases	15,639	13,577	4,224
Assets, Sales	(14,912)	(11,090)	(5,138)
Assets, Transfers into Level 3	0	0	0
Assets, Transfers out of Level 3	0	0	0
Assets, Ending Balance	8,041	7,533	5,198
Level 3 | Securities | Corporate equity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	11,111	7,556	1,590
Assets, Accreted Discounts/Amortized Premiums	0	0	0
Assets, Realized Gain (Loss)	1,071	880	324
Assets, Change In Net Unrealized Gain/(Loss)	(1,084)	(456)	1,783
Assets, Purchases	6,919	5,768	5,829
Assets, Sales	(5,723)	(2,637)	(1,970)
Assets, Transfers into Level 3	0	0	0
Assets, Transfers out of Level 3	0	0	0
Assets, Ending Balance	12,294	11,111	7,556
Level 3 | Securities | Other asset-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	0
Assets, Accreted Discounts/Amortized Premiums	40
Assets, Realized Gain (Loss)	829
Assets, Change In Net Unrealized Gain/(Loss)	236
Assets, Purchases	7,552
Assets, Sales	(961)
Assets, Transfers into Level 3	0
Assets, Transfers out of Level 3	0
Assets, Ending Balance	7,696	0
Level 3 | Loans
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Change in unrealized gain (loss), assets	623,000	(136,100)	(20,500)
Level 3 | Loans | Residential mortgage loans
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	3,115,518	2,016,228	1,187,069
Assets, Accreted Discounts/Amortized Premiums	(8,336)	(13,607)	(13,746)
Assets, Realized Gain (Loss)	(14,423)	(18,124)	(423)
Assets, Change In Net Unrealized Gain/(Loss)	82,245	(335,384)	(20,204)
Assets, Purchases	1,545,037	2,754,030	1,546,371
Assets, Sales	(1,626,129)	(1,287,625)	(682,839)
Assets, Transfers into Level 3	0	0	0
Assets, Transfers out of Level 3	0	0	0
Assets, Ending Balance	3,093,912	3,115,518	2,016,228
Level 3 | Loans | Commercial mortgage loans
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	404,324	326,197	213,031
Assets, Accreted Discounts/Amortized Premiums	0	0	(8)
Assets, Realized Gain (Loss)	2	22	304
Assets, Change In Net Unrealized Gain/(Loss)	(1,666)	(2,156)	(271)
Assets, Purchases	149,575	428,568	403,078
Assets, Sales	(285,640)	(348,307)	(289,937)
Assets, Transfers into Level 3	0	0	0
Assets, Transfers out of Level 3	0	0	0
Assets, Ending Balance	266,595	404,324	326,197
Level 3 | Loans | Consumer loans
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	4,843	62,365	47,525
Assets, Accreted Discounts/Amortized Premiums	(805)	(3,070)	(7,633)
Assets, Realized Gain (Loss)	(374)	(2,145)	(1,415)
Assets, Change In Net Unrealized Gain/(Loss)	102	427	(5)
Assets, Purchases	678	11,948	58,010
Assets, Sales	(2,685)	(64,682)	(34,117)
Assets, Transfers into Level 3	0	0	0
Assets, Transfers out of Level 3	0	0	0
Assets, Ending Balance	1,759	4,843	62,365
Level 3 | Loans | Corporate loan [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	4,086	10,531	5,855
Assets, Accreted Discounts/Amortized Premiums	0	0	0
Assets, Realized Gain (Loss)	354	(1,000)	0
Assets, Change In Net Unrealized Gain/(Loss)	(515)	(46)	0
Assets, Purchases	4,330	3,040	11,334
Assets, Sales	(2,436)	(8,439)	(6,658)
Assets, Transfers into Level 3	0	0	0
Assets, Transfers out of Level 3	0	0	0
Assets, Ending Balance	5,819	4,086	10,531
Level 3 | Loans | Reverse mortgage loans
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	8,097,237	0
Assets, Accreted Discounts/Amortized Premiums	0	0
Assets, Realized Gain (Loss)	(30)	(197)
Assets, Change In Net Unrealized Gain/(Loss)	539,872	200,741
Assets, Purchases	1,819,452	8,143,368
Assets, Sales	(1,517,980)	(246,675)
Assets, Transfers into Level 3	0	0
Assets, Transfers out of Level 3	0	0
Assets, Ending Balance	8,938,551	8,097,237	0
Level 3 | Investment in unconsolidated entities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	127,046	195,643	141,620
Assets, Accreted Discounts/Amortized Premiums	0	0	0
Assets, Realized Gain (Loss)	(1,320)	14,712	5,510
Assets, Change In Net Unrealized Gain/(Loss)	465	(78,326)	52,594
Assets, Purchases	143,081	257,731	168,757
Assets, Sales	(152,858)	(262,714)	(172,838)
Assets, Transfers into Level 3	0	0	0
Assets, Transfers out of Level 3	0	0	0
Assets, Ending Balance	116,414	127,046	195,643
Change in unrealized gain (loss), assets	(4,000)	(36,100)	51,700
Level 3 | Financial Derivatives - Assets
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Change in unrealized gain (loss), assets	6	600	(43)
Level 3 | Financial Derivatives - Assets | Total return swaps
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	0	0	9
Assets, Accreted Discounts/Amortized Premiums	0		0
Assets, Realized Gain (Loss)	61		170
Assets, Change In Net Unrealized Gain/(Loss)	6		(9)
Assets, Purchases	0		0
Assets, Sales	(61)		(170)
Assets, Transfers into Level 3	0		0
Assets, Transfers out of Level 3	0		0
Assets, Ending Balance	6	0	0
Level 3 | Financial Derivatives - Assets | Credit default swaps on asset-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	76	303	347
Assets, Accreted Discounts/Amortized Premiums	0	0	0
Assets, Realized Gain (Loss)	(664)	(855)	34
Assets, Change In Net Unrealized Gain/(Loss)	596	615	(44)
Assets, Purchases	19	13	15
Assets, Sales	(19)	0	(49)
Assets, Transfers into Level 3	0	0	0
Assets, Transfers out of Level 3	0	0	0
Assets, Ending Balance	8	76	303
Level 3 | Mortgage servicing rights
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	8,108	0
Assets, Accreted Discounts/Amortized Premiums	0	0
Assets, Realized Gain (Loss)	0	0
Assets, Change In Net Unrealized Gain/(Loss)	21,472	(66)
Assets, Purchases	0	8,174
Assets, Sales	0	0
Assets, Transfers into Level 3	0	0
Assets, Transfers out of Level 3	0	0
Assets, Ending Balance	29,580	8,108	0
Change in unrealized gain (loss), assets	21,500	(66)
Level 3 | Servicing-related asset
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	999	0
Assets, Accreted Discounts/Amortized Premiums	0	0
Assets, Realized Gain (Loss)	0	0
Assets, Change In Net Unrealized Gain/(Loss)	328	35
Assets, Purchases	0	964
Assets, Sales	0	0
Assets, Transfers into Level 3	0	0
Assets, Transfers out of Level 3	0	0
Assets, Ending Balance	1,327	999	0
Change in unrealized gain (loss), assets	300	35
Level 3 | Loan commitments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	3,060	0
Assets, Accreted Discounts/Amortized Premiums	0	0
Assets, Realized Gain (Loss)	0	0
Assets, Change In Net Unrealized Gain/(Loss)	(476)	(30)
Assets, Purchases	0	3,090
Assets, Sales	0	0
Assets, Transfers into Level 3	0	0
Assets, Transfers out of Level 3	0	0
Assets, Ending Balance	2,584	3,060	$ 0
Change in unrealized gain (loss), assets	(500)	(30)
Level 3 | Forward MSR-related Investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	0
Assets, Accreted Discounts/Amortized Premiums	703
Assets, Realized Gain (Loss)	0
Assets, Change In Net Unrealized Gain/(Loss)	(1,288)
Assets, Purchases	177,421
Assets, Sales	(13,500)
Assets, Transfers into Level 3	0
Assets, Transfers out of Level 3	0
Assets, Ending Balance	163,336	$ 0
Change in unrealized gain (loss), assets	$ (1,300)