Annual report pursuant to Section 13 and 15(d)

Goodwill and Other Intangibles - Summary of Other Intangible Assets (Detail)

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Goodwill and Other Intangibles - Summary of Other Intangible Assets (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Acquired Finite-Lived Intangible Assets [Line Items]    
Accumulated amortization $ (1,854) $ (1,545)
Net carrying amount, excluding goodwill 842  
Goodwill 11,031 11,031
Gross carrying amount 13,727 13,727
Net carrying amount $ 11,873 12,182
Core deposit intangible    
Acquired Finite-Lived Intangible Assets [Line Items]    
Amortization Period 10 years  
Gross carrying amount, excluding goodwill $ 2,213 2,213
Accumulated amortization (1,567) (1,360)
Net carrying amount, excluding goodwill $ 646 853
Third-party originators intangible    
Acquired Finite-Lived Intangible Assets [Line Items]    
Amortization Period 7 years  
Gross carrying amount, excluding goodwill $ 483 483
Accumulated amortization (287) (185)
Net carrying amount, excluding goodwill $ 196 $ 298