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Goodwill and Core Deposit Intangibles - Additional Information (Details)
12 Months Ended
Dec. 31, 2020
USD ($)
Schedule Of Intangible Assets And Goodwill [Line Items]  
Impairment recorded on goodwill and core deposit intangibles $ 0
Minimum [Member]  
Schedule Of Intangible Assets And Goodwill [Line Items]  
Finite-lived intangible assets, useful life 10 years
Maximum [Member]  
Schedule Of Intangible Assets And Goodwill [Line Items]  
Finite-lived intangible assets, useful life 15 years