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Fair Value Measurements - Schedule of Valuation Inputs and Assumptions (Details) $ in Thousands | Mar. 31, 2024 USD ($) | Dec. 31, 2023
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Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Aggregate amount committed | $ 6,459 |
Conditional prepayment rate | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Residual investments | 0.124 | 0.122
Residual interests classified as debt | 0.127 | 0.123
Conditional prepayment rate | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Residual investments | 0.299 | 0.283
Residual interests classified as debt | 0.128 | 0.126
Conditional prepayment rate | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Residual investments | 0.155 | 0.148
Residual interests classified as debt | 0.128 | 0.124
Annual default rate | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Residual investments | 0.005 | 0.005
Residual interests classified as debt | 0.008 | 0.007
Annual default rate | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Residual investments | 0.069 | 0.069
Residual interests classified as debt | 0.008 | 0.007
Annual default rate | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Residual investments | 0.015 | 0.014
Residual interests classified as debt | 0.008 | 0.007
Discount rate | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Residual investments | 0.058 | 0.058
Residual interests classified as debt | 0.100 | 0.100
Discount rate | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Residual investments | 0.135 | 0.155
Residual interests classified as debt | 0.103 | 0.103
Discount rate | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Residual investments | 0.088 | 0.087
Residual interests classified as debt | 0.100 | 0.100
Loan funding probability | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Interest rate lock commitments | 0.489 | 0.719
Student loan commitments | 0.950 | 0.950
Loan funding probability | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Interest rate lock commitments | 0.858 | 0.772
Student loan commitments | 0.950 | 0.950
Loan funding probability | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Interest rate lock commitments | 0.792 | 0.763
Student loan commitments | 0.950 | 0.950
Personal loans | Conditional prepayment rate | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Loans | 0.184 | 0.175
Servicing rights | 0.086 | 0.179
Personal loans | Conditional prepayment rate | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Loans | 0.295 | 0.295
Servicing rights | 0.381 | 0.355
Personal loans | Conditional prepayment rate | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Loans | 0.247 | 0.232
Servicing rights | 0.225 | 0.224
Personal loans | Annual default rate | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Loans | 0.047 | 0.045
Servicing rights | 0.033 | 0.033
Personal loans | Annual default rate | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Loans | 0.487 | 0.504
Servicing rights | 0.160 | 0.225
Personal loans | Annual default rate | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Loans | 0.048 | 0.048
Servicing rights | 0.040 | 0.047
Personal loans | Discount rate | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Loans | 0.057 | 0.055
Servicing rights | 0.088 | 0.088
Personal loans | Discount rate | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Loans | 0.081 | 0.081
Servicing rights | 0.200 | 0.088
Personal loans | Discount rate | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Loans | 0.058 | 0.055
Servicing rights | 0.091 | 0.088
Personal loans | Market servicing costs | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Servicing rights | 0.002 | 0.001
Personal loans | Market servicing costs | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Servicing rights | 0.010 | 0.018
Personal loans | Market servicing costs | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Servicing rights | 0.002 | 0.002
Student loans | Conditional prepayment rate | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Loans | 0.077 | 0.084
Servicing rights | 0.081 | 0.109
Student loans | Conditional prepayment rate | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Loans | 0.126 | 0.126
Servicing rights | 0.151 | 0.153
Student loans | Conditional prepayment rate | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Loans | 0.105 | 0.105
Servicing rights | 0.121 | 0.122
Student loans | Annual default rate | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Loans | 0.006 | 0.004
Servicing rights | 0.003 | 0.003
Student loans | Annual default rate | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Loans | 0.061 | 0.064
Servicing rights | 0.036 | 0.037
Student loans | Annual default rate | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Loans | 0.006 | 0.006
Servicing rights | 0.007 | 0.006
Student loans | Discount rate | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Loans | 0.043 | 0.041
Servicing rights | 0.088 | 0.088
Student loans | Discount rate | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Loans | 0.088 | 0.081
Servicing rights | 0.088 | 0.088
Student loans | Discount rate | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Loans | 0.043 | 0.043
Servicing rights | 0.088 | 0.088
Student loans | Market servicing costs | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Servicing rights | 0.001 | 0.001
Student loans | Market servicing costs | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Servicing rights | 0.002 | 0.002
Student loans | Market servicing costs | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Servicing rights | 0.001 | 0.001
Home loans | Conditional prepayment rate | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Servicing rights | 0.055 | 0.056
Home loans | Conditional prepayment rate | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Servicing rights | 0.238 | 0.240
Home loans | Conditional prepayment rate | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Servicing rights | 0.086 | 0.081
Home loans | Annual default rate | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Servicing rights | 0.001 | 0.001
Home loans | Annual default rate | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Servicing rights | 0.001 | 0.001
Home loans | Annual default rate | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Servicing rights | 0.001 | 0.001
Home loans | Discount rate | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Servicing rights | 0.092 | 0.092
Home loans | Discount rate | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Servicing rights | 0.100 | 0.100
Home loans | Discount rate | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Servicing rights | 0.093 | 0.093
Home loans | Market servicing costs | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Servicing rights | 0.001 | 0.001
Home loans | Market servicing costs | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Servicing rights | 0.002 | 0.002
Home loans | Market servicing costs | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Servicing rights | 0.002 | 0.002

X
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