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Accounting Standards Updates Accounting Standards Updates - Additional Information (Details) - USD ($)
$ in Thousands
Jan. 01, 2020
Dec. 31, 2018
Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Cumulative effect of new accounting principle in period of adoption   $ (14,672) $ (2,285)
Minimum [Member] | Scenario, Forecast [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Percentage increase in allowance for loan losses and reserve for unfunded commitments 15.00%    
Maximum [Member] | Scenario, Forecast [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Percentage increase in allowance for loan losses and reserve for unfunded commitments 25.00%    
Retained Earnings [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Cumulative effect of new accounting principle in period of adoption   $ (14,672) $ (2,285)