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Goodwill and Other Intangible Assets - Summary of Goodwill and Other Intangible Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Aug. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]      
Goodwill $ 7,435 $ 7,400 $ 7,435
Gross carrying amount 2,048    
Accumulated amortization (658)    
Core deposit intangible, net 1,390    
Total $ 8,825 $ 9,312