Valuation (Significant Unobservable Inputs Rollforward) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) $ / shares	Dec. 31, 2021 USD ($) $ / shares	Dec. 31, 2020 USD ($)
Fair Value, Measurements, Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 13,357,204	$ 4,717,218
Level 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	2,881,539	1,959,802	$ 1,721,275
Assets, Accreted Discounts/Amortized Premiums	(25,276)	(29,151)	(39,237)
Assets, Realized Gain (Loss)	3,821	13,950	(15,898)
Assets, Change In Net Unrealized Gain/(Loss)	(248,666)	50,118	36,777
Assets, Purchases	11,774,365	2,330,325	1,131,307
Assets, Sales	(2,332,198)	(1,423,986)	(945,519)
Assets, Transfers into Level 3	35,266	13,797	92,143
Assets, Transfers out of Level 3	(54,490)	(33,316)	(21,046)
Assets, Ending Balance	12,034,361	2,881,539	1,959,802
Liabilities, Begining Balance	(984,168)	(755,405)	(594,832)
Liabilities, Accreted Discounts/Amortized Premiums	(802)	0	0
Liabilities, Realized Gain/(Loss)	0	(1,427)	(551)
Liabilities, Change In Net Unrealized Gain/(Loss)	113,924	16,327	(9,364)
Liabilities Purchases/Payments	560,812	585,301	306,420
Liabilities, Sales/Issuance	(9,208,637)	(828,964)	(457,078)
Liabilities, Transfers into Level 3	0	0	0
Liabilities, Transfers out of Level 3	0	0	0
Liabilities, Ending Balance	(9,518,871)	(984,168)	(755,405)
Level 3 | Fair Value, Measurements, Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	12,034,361	2,881,539
Level 3 | Non-Agency RMBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	132,502	134,888
Level 3 | Non-Agency RMBS | Valuation, Income Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	72,671	45,544
Level 3 | Non-Agency RMBS | Valuation, Market Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 59,831	$ 89,344
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	0.34
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	159.91	222.87
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	69.79	85.17
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	0
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	0.957	0.386
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	0.121	0.068
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	0
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	0.744
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	0.520	0.391
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	0
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	0.974	0.829
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	0.165	0.225
Level 3 | CMBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 12,649	$ 13,134
Level 3 | CMBS | Valuation, Income Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	569	268
Level 3 | CMBS | Valuation, Market Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 12,080	$ 12,866
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	5.54	7.00
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	69.07	90.77
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	38.37	56.98
Level 3 | CMBS | Measurement Input, Discount Rate | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.094	0.076
Level 3 | CMBS | Measurement Input, Discount Rate | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.175	0.263
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	0.127	0.103
Level 3 | CMBS | Measurement Input, Default Rate | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.012	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	0.398	0.065
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	0.058	0.023
Level 3 | CLOs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 24,598	$ 26,678
Level 3 | CLOs | Valuation, Income Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	6,673	8,014
Level 3 | CLOs | Valuation, Market Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 17,925	$ 18,664
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	3.96	14.00
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	92.00	99.75
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	57.94	54.99
Level 3 | CLOs | Measurement Input, Discount Rate | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.132	0.090
Level 3 | CLOs | Measurement Input, Discount Rate | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input	0.361	2.921
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	0.233	0.328
Level 3 | CLOs | Measurement Input, Prepayment Rate | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input		0.134
Level 3 | CLOs | Measurement Input, Prepayment Rate | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input		0.945
Level 3 | CLOs | Measurement Input, Prepayment Rate | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input		0.913
Level 3 | CLOs | Measurement Input, Default Rate | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input		0.019
Level 3 | CLOs | Measurement Input, Default Rate | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input		0.689
Level 3 | CLOs | Measurement Input, Default Rate | Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Securities, measurement input		0.044
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	$ 73,644	$ 73,108
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	0.067	0.095
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	0.279	0.228
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	0.135	0.157
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	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	0.183	0.116
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	0.144	0.090
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	0.006	0.010
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	0.352	0.311
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	0.213	0.209
Level 3 | Residential mortgage loans | Performing Financial Instruments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets		$ 952,656
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	$ 1,416,951	951,723
Level 3 | Residential mortgage loans | Measurement Input, Exercise Price | Valuation, Cost Approach | Performing Financial Instruments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets		$ 933
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	0.005	0.009
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	0.535	0.575
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	0.087	0.047
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	$ 386,741	$ 310,735
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	0.052	0.051
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	0.165	0.106
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	0.105	0.072
Level 3 | Consumer loans | Valuation, Income Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 4,843	$ 62,365
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	0.106	0.052
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	0.282	0.756
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	0.176	0.093
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	0.001
Securities, 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	0.217
Securities, measurement input		0.284
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	0.122
Securities, measurement input		0.141
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	0.004
Securities, measurement input		0.009
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	0.612
Securities, measurement input		0.866
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	0.132
Securities, measurement input		0.097
Level 3 | Corporate loan [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets		$ 10,531
Level 3 | Corporate loan [Member] | Valuation, Income Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 4,086	3,531
Level 3 | Corporate loan [Member] | Valuation, Market Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets		$ 7,000
Level 3 | Corporate loan [Member] | 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		100.00
Level 3 | Corporate loan [Member] | 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		100.00
Level 3 | Corporate loan [Member] | 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		100.00
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	0.060	0.030
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	0.130	0.219
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	0.071	0.161
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	$ 76	$ 303
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	$ (1,539,881)	$ (984,168)
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	54.94	93.34
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	98.22	102.14
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	87.34	99.94
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	0.037	0.018
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	0.085	0.025
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	0.069	0.021
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	0.933	0
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	0.963	0.972
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	0.945	0.681
Level 3 | Investment in unconsolidated entities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 127,046	$ 195,643
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	88,905	57,828
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	1,042	14,036
Level 3 | Senior Notes | Valuation, Market Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value	$ (191,835)
Level 3 | Senior Notes | 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	91.35
Level 3 | Senior Notes | 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	91.35
Level 3 | Senior Notes | 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	91.35
Level 3 | HECM loans | Valuation, Income Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 7,993,635
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	0.042
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	0.063
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	0.052
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	0.018
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	0.446
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	0.098
Level 3 | Proprietary reverse mortgage loans | Valuation, Income Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 103,602
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	0.065
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	0.086
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	0.081
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	0.138
Level 3 | Mortgage servicing rights | Valuation, Income Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 8,108
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	0.120
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	0.120
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	0.120
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	0.110
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	0.147
Level 3 | Servicing-related asset | Valuation, Income Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 999
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	0.117
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	0.117
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	0.117
Level 3 | Loan commitments | Valuation, Income Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets	$ 3,060
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	0.562
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	0.737
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	0.024
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	0.071
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	0.044
Level 3 | HMBS-related obligations | Valuation, Market Approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value	$ (7,787,155)
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	0.041
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	0.061
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	0.051
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	0.073
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	0.367
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	0.098
Level 3 | Other secured borrowings, at fair value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Liabilities, Payments		583,874	305,828
Liabilities, Issuances		(828,964)	(457,037)
Liabilities, Begining Balance	$ (984,168)	(754,921)	(594,396)
Liabilities, Accreted Discounts/Amortized Premiums	(802)	0	0
Liabilities, Realized Gain/(Loss)	0	0	0
Liabilities, Change In Net Unrealized Gain/(Loss)	258,140	15,843	(9,316)
Liabilities Purchases/Payments	312,359
Liabilities, Sales/Issuance	(1,125,410)
Liabilities, Transfers into Level 3	0	0	0
Liabilities, Transfers out of Level 3	0	0	0
Liabilities, Ending Balance	(1,539,881)	(984,168)	(754,921)
Change in unrealized gains (losses), liabilities	258,100	15,800	(9,300)
Level 3 | Financial Derivatives - Liabilities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Change in unrealized gains (losses), liabilities			(500)
Level 3 | Senior notes
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Liabilities, Begining Balance	0
Liabilities, Accreted Discounts/Amortized Premiums	0
Liabilities, Realized Gain/(Loss)	0
Liabilities, Change In Net Unrealized Gain/(Loss)	18,165
Liabilities Purchases/Payments	0
Liabilities, Sales/Issuance	(210,000)
Liabilities, Transfers into Level 3	0
Liabilities, Transfers out of Level 3	0
Liabilities, Ending Balance	(191,835)	0
Level 3 | Senior Notes
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Change in unrealized gains (losses), liabilities	18,200
Level 3 | HMBS-related obligations
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Liabilities, Begining Balance	0
Liabilities, Accreted Discounts/Amortized Premiums	0
Liabilities, Realized Gain/(Loss)	0
Liabilities, Change In Net Unrealized Gain/(Loss)	(162,381)
Liabilities Purchases/Payments	248,453
Liabilities, Sales/Issuance	(7,873,227)
Liabilities, Transfers into Level 3	0
Liabilities, Transfers out of Level 3	0
Liabilities, Ending Balance	(7,787,155)	0
Change in unrealized gains (losses), liabilities	(162,400)
Level 3 | Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Change in unrealized gain (loss), assets	(38,300)	7,000	(33,300)
Level 3 | Securities | Agency RMBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	9,710	11,663	19,904
Assets, Accreted Discounts/Amortized Premiums	(1,963)	(3,565)	(7,903)
Assets, Realized Gain (Loss)	(130)	882	722
Assets, Change In Net Unrealized Gain/(Loss)	(1,169)	(1,924)	3,175
Assets, Purchases	3,132	2,889	8,307
Assets, Sales	(1,442)	(1,533)	(5,046)
Assets, Transfers into Level 3	3,024	3,683	1,083
Assets, Transfers out of Level 3	(4,135)	(2,385)	(8,579)
Assets, Ending Balance	7,027	9,710	11,663
Level 3 | Securities | Non-Agency RMBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	134,888	127,838	89,581
Assets, Accreted Discounts/Amortized Premiums	993	2,484	1,557
Assets, Realized Gain (Loss)	37	3,363	1,009
Assets, Change In Net Unrealized Gain/(Loss)	(13,934)	(3,735)	(1,283)
Assets, Purchases	77,994	51,099	64,362
Assets, Sales	(35,522)	(49,406)	(40,841)
Assets, Transfers into Level 3	13,235	8,181	17,425
Assets, Transfers out of Level 3	(45,189)	(4,936)	(3,972)
Assets, Ending Balance	132,502	134,888	127,838
Level 3 | Securities | CMBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	13,134	63,148	29,805
Assets, Accreted Discounts/Amortized Premiums	120	434	813
Assets, Realized Gain (Loss)	3,050	4,329	62
Assets, Change In Net Unrealized Gain/(Loss)	(2,807)	5,000	(2,477)
Assets, Purchases	620	902	52,915
Assets, Sales	(5,297)	(60,449)	(38,553)
Assets, Transfers into Level 3	3,829	389	20,583
Assets, Transfers out of Level 3	0	619	0
Assets, Ending Balance	12,649	13,134	63,148
Level 3 | Securities | CLOs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	26,678	111,100	44,979
Assets, Accreted Discounts/Amortized Premiums	(1,884)	(1,580)	2,185
Assets, Realized Gain (Loss)	6,245	935	(8,862)
Assets, Change In Net Unrealized Gain/(Loss)	(2,825)	18,843	(13,132)
Assets, Purchases	0	104	48,120
Assets, Sales	(13,628)	(78,892)	(6,747)
Assets, Transfers into Level 3	15,178	1,544	53,052
Assets, Transfers out of Level 3	(5,166)	(25,376)	(8,495)
Assets, Ending Balance	24,598	26,678	111,100
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	73,108	44,925	48,610
Assets, Accreted Discounts/Amortized Premiums	(5,865)	(5,537)	(4,986)
Assets, Realized Gain (Loss)	(36)	(1,881)	(138)
Assets, Change In Net Unrealized Gain/(Loss)	(11,771)	(2,122)	(1,245)
Assets, Purchases	62,348	77,713	30,899
Assets, Sales	(44,140)	(39,990)	(28,215)
Assets, Transfers into Level 3	0	0	0
Assets, Transfers out of Level 3	0	0	0
Assets, Ending Balance	73,644	73,108	44,925
Level 3 | Securities | Corporate debt securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	5,198	4,082	1,113
Assets, Accreted Discounts/Amortized Premiums	0	0	0
Assets, Realized Gain (Loss)	1,362	1,818	914
Assets, Change In Net Unrealized Gain/(Loss)	(1,514)	212	1,068
Assets, Purchases	13,577	4,224	5,668
Assets, Sales	(11,090)	(5,138)	(4,681)
Assets, Transfers into Level 3	0	0	0
Assets, Transfers out of Level 3	0	0	0
Assets, Ending Balance	7,533	5,198	4,082
Level 3 | Securities | Corporate equity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	7,556	1,590	1,394
Assets, Accreted Discounts/Amortized Premiums	0	0	0
Assets, Realized Gain (Loss)	880	324	7
Assets, Change In Net Unrealized Gain/(Loss)	(456)	1,783	(165)
Assets, Purchases	5,768	5,829	366
Assets, Sales	(2,637)	(1,970)	(12)
Assets, Transfers into Level 3	0	0	0
Assets, Transfers out of Level 3	0	0	0
Assets, Ending Balance	11,111	7,556	1,590
Level 3 | Loans
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Change in unrealized gain (loss), assets	(136,100)	(20,500)	8,600
Level 3 | Loans | Residential mortgage loans
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	2,016,228	1,187,069	932,203
Assets, Accreted Discounts/Amortized Premiums	(13,607)	(13,746)	(6,445)
Assets, Realized Gain (Loss)	(18,124)	(423)	(165)
Assets, Change In Net Unrealized Gain/(Loss)	(335,384)	(20,204)	11,593
Assets, Purchases	2,754,030	1,546,371	594,397
Assets, Sales	(1,287,625)	(682,839)	(344,514)
Assets, Transfers into Level 3	0	0	0
Assets, Transfers out of Level 3	0	0	0
Assets, Ending Balance	3,115,518	2,016,228	1,187,069
Level 3 | Loans | Commercial mortgage loans
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	326,197	213,031	274,759
Assets, Accreted Discounts/Amortized Premiums	0	(8)	128
Assets, Realized Gain (Loss)	22	304	135
Assets, Change In Net Unrealized Gain/(Loss)	(2,156)	(271)	(166)
Assets, Purchases	428,568	403,078	121,844
Assets, Sales	(348,307)	(289,937)	(183,669)
Assets, Transfers into Level 3	0	0	0
Assets, Transfers out of Level 3	0	0	0
Assets, Ending Balance	404,324	326,197	213,031
Level 3 | Loans | Consumer loans
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	62,365	47,525	186,954
Assets, Accreted Discounts/Amortized Premiums	(3,070)	(7,633)	(24,586)
Assets, Realized Gain (Loss)	(2,145)	(1,415)	(4,843)
Assets, Change In Net Unrealized Gain/(Loss)	427	(5)	(2,891)
Assets, Purchases	11,948	58,010	141,245
Assets, Sales	(64,682)	(34,117)	(248,354)
Assets, Transfers into Level 3	0	0	0
Assets, Transfers out of Level 3	0	0	0
Assets, Ending Balance	4,843	62,365	47,525
Level 3 | Loans | Corporate loan [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	10,531	5,855	18,510
Assets, Accreted Discounts/Amortized Premiums	0	0	0
Assets, Realized Gain (Loss)	(1,000)	0	0
Assets, Change In Net Unrealized Gain/(Loss)	(46)	0	0
Assets, Purchases	3,040	11,334	1,445
Assets, Sales	(8,439)	(6,658)	(14,100)
Assets, Transfers into Level 3	0	0	0
Assets, Transfers out of Level 3	0	0	0
Assets, Ending Balance	4,086	10,531	5,855
Level 3 | Loans | Reverse mortgage loans
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	0
Assets, Accreted Discounts/Amortized Premiums	0
Assets, Realized Gain (Loss)	(197)
Assets, Change In Net Unrealized Gain/(Loss)	200,741
Assets, Purchases	8,143,368
Assets, Sales	(246,675)
Assets, Transfers into Level 3	0
Assets, Transfers out of Level 3	0
Assets, Ending Balance	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	195,643	141,620	71,850
Assets, Accreted Discounts/Amortized Premiums	0	0	0
Assets, Realized Gain (Loss)	14,712	5,510	424
Assets, Change In Net Unrealized Gain/(Loss)	(78,326)	52,594	37,509
Assets, Purchases	257,731	168,757	61,589
Assets, Sales	(262,714)	(172,838)	(29,752)
Assets, Transfers into Level 3	0	0	0
Assets, Transfers out of Level 3	0	0	0
Assets, Ending Balance	127,046	195,643	141,620
Change in unrealized gain (loss), assets	(36,100)	51,700	37,100
Level 3 | Financial Derivatives - Assets
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Change in unrealized gain (loss), assets	600	(43)	500
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	9	620
Assets, Accreted Discounts/Amortized Premiums		0	0
Assets, Realized Gain (Loss)		170	288
Assets, Change In Net Unrealized Gain/(Loss)		(9)	(611)
Assets, Purchases		0	126
Assets, Sales		(170)	(414)
Assets, Transfers into Level 3		0	0
Assets, Transfers out of Level 3		0	0
Assets, Ending Balance		0	9
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	303	347	993
Assets, Accreted Discounts/Amortized Premiums	0	0	0
Assets, Realized Gain (Loss)	(855)	34	(5,451)
Assets, Change In Net Unrealized Gain/(Loss)	615	(44)	5,402
Assets, Purchases	13	15	24
Assets, Sales	0	(49)	(621)
Assets, Transfers into Level 3	0	0	0
Assets, Transfers out of Level 3	0	0	0
Assets, Ending Balance	76	303	347
Level 3 | Financial Derivatives - Liabilities | Total return swaps
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Liabilities, Payments		1,427	592
Liabilities, Issuances		0	(41)
Liabilities, Begining Balance	0	(484)	(436)
Liabilities, Accreted Discounts/Amortized Premiums		0	0
Liabilities, Realized Gain/(Loss)		(1,427)	(551)
Liabilities, Change In Net Unrealized Gain/(Loss)		484	(48)
Liabilities, Transfers into Level 3		0	0
Liabilities, Transfers out of Level 3		0	0
Liabilities, Ending Balance		0	$ (484)
Level 3 | Mortgage servicing rights
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	0
Assets, Accreted Discounts/Amortized Premiums	0
Assets, Realized Gain (Loss)	0
Assets, Change In Net Unrealized Gain/(Loss)	(66)
Assets, Purchases	8,174
Assets, Sales	0
Assets, Transfers into Level 3	0
Assets, Transfers out of Level 3	0
Assets, Ending Balance	8,108	0
Change in unrealized gain (loss), assets	(66)
Level 3 | Servicing-related asset
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	0
Assets, Accreted Discounts/Amortized Premiums	0
Assets, Realized Gain (Loss)	0
Assets, Change In Net Unrealized Gain/(Loss)	35
Assets, Purchases	964
Assets, Sales	0
Assets, Transfers into Level 3	0
Assets, Transfers out of Level 3	0
Assets, Ending Balance	999	0
Change in unrealized gain (loss), assets	35
Level 3 | Loan commitments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Beginning Balance	0
Assets, Accreted Discounts/Amortized Premiums	0
Assets, Realized Gain (Loss)	0
Assets, Change In Net Unrealized Gain/(Loss)	(30)
Assets, Purchases	3,090
Assets, Sales	0
Assets, Transfers into Level 3	0
Assets, Transfers out of Level 3	0
Assets, Ending Balance	3,060	$ 0
Change in unrealized gain (loss), assets	$ (30)