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Other Liabilities Held for Sale (Details)
3 Months Ended
Mar. 31, 2021
USD ($)
Mar. 31, 2020
USD ($)
Mar. 12, 2021
branch
Business Acquisition [Line Items]      
Gain on sale of business $ 5,300,000 $ 5,900,000  
Disposal Group, Held-for-sale, Not Discontinued Operations      
Business Acquisition [Line Items]      
Disposal Group, Including Discontinued Operation, Other Liabilities 0    
Disposal Group, Held-for-sale, Not Discontinued Operations | Illinois Branches      
Business Acquisition [Line Items]      
Number of branches sold | branch     4
Gain on sale of business $ 5,300,000