Fair Value Measurements - Schedule of Fair Value Liabilities Measured On Non-Recurring Basis Valuation Techniques (Parenthetical) (Detail)  | 
Mar. 31, 2021  | 
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| Measurement Input, Constant Prepayment Rate [Member] | |
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |
| Percentage of fair value weighted average | 0.1 | 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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- Definition Value of input used to measure servicing asset. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Details 
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