Fair Value - Summary of HMBS Related Obligations (Detail) - HMBS Related Obligations [Member] - Weighted Average [Member] |
6 Months Ended | 12 Months Ended |
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Jun. 30, 2021 |
Dec. 31, 2020 |
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| Conditional repayment rate [Member] | ||
| Fair Value HMBS Related Obligations Measured On Recurring And Nonrecurring Basis Fair Value Measurement [Line Items] | ||
| Conditional repayment rate | 20.20% | 19.90% |
| Discount rate [Member] | ||
| Fair Value HMBS Related Obligations Measured On Recurring And Nonrecurring Basis Fair Value Measurement [Line Items] | ||
| Discount rate | 1.70% | 1.40% |
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- Definition Fair value HMBS related obligations measured on recurring and nonrecurring basis fair value measurement. No definition available.
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- Definition Share based compensation arrangement by share based payment award fair value assumptions conditional repayment rate. No definition available.
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- Definition Share based compensation arrangement by share based payment award fair value assumptions discount rate. No definition available.
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