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Basis of Presentation - Additional Information (Detail)
3 Months Ended 6 Months Ended
Jun. 30, 2020
USD ($)
Loan
Jun. 05, 2020
Mar. 13, 2017
Mar. 31, 2020
USD ($)
Jun. 30, 2020
USD ($)
Loan
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]          
Goodwill impairment       $ 0 $ 0
Estimated fair value $ 480,850       $ 480,850
CARES Act payment deferral program number of loans deferred | Loan 1,296       1,296
CARES Act payment deferral program balance of loans deferred $ 649,326       $ 649,326
CARES Act payment deferral program amount of deferred interest 7,013       7,013
CARES Act aid amount of outstanding balance         649,326,000
Debt instrument term   5 years 5 years    
COVID-19 [Member] | Hospitality [Member]          
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]          
Approximately amount of outstanding loans and commitments to industries consider higher risk impacted by COVID-19 virus 273,000,000       273,000,000
COVID-19 [Member] | Retail [Member]          
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]          
Approximately amount of outstanding loans and commitments to industries consider higher risk impacted by COVID-19 virus 206,000,000       206,000,000
COVID-19 [Member] | Restaurants [Member]          
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]          
Approximately amount of outstanding loans and commitments to industries consider higher risk impacted by COVID-19 virus 108,000,000       108,000,000
COVID-19 [Member] | Aircraft Manufacturing [Member]          
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]          
Approximately amount of outstanding loans and commitments to industries consider higher risk impacted by COVID-19 virus 63,000,000       63,000,000
Coronavirus Aid, Relief, and Economic Security Act [Member]          
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]          
Cares act relief fund for COVID-19 $ 2,000,000,000,000       2,000,000,000,000
Paycheck Protection Program [Member]          
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]          
CARES Act aid amount of outstanding balance         $ 372,964
Debt instrument, interest rate, stated percentage 1.00%       1.00%
Debt instrument term         2 years