Fair Value Measurements - Schedule of Fair Value Liabilities Measured On Non-Recurring Basis Valuation Techniques (Parenthetical) (Detail)  | 
Jun. 30, 2020  | 
Dec. 31, 2019  | 
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| Measurement Input, Constant Prepayment Rate [Member] | ||
| Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items] | ||
| Percentage of fair value weighted average | 0.1 | 0.1 | 
| X | ||||||||||
- Definition Fair value assets and liabilities measured on non recurring basis. No definition available. 
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| X | ||||||||||
- Definition Value of input used to measure servicing asset. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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| X | ||||||||||
- Details 
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