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Fair Value Option - Additional Information (Details) - Loans Held For Sale [Member] - USD ($)
Jun. 30, 2020
Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Fair value option, loans 90 days or more past due $ 5,000,000 $ 0
Loans held as assets, 90 days or more past due, unpaid principal balance 9,000,000  
Fair value option loan in nonaccrual status $ 0 $ 0