Quarterly report pursuant to Section 13 or 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
 3 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Acquired Finite-Lived Intangible Assets [Line Items]    
Accumulated amortization $ (2,169) $ (2,115)
Goodwill 11,031 11,031
Gross carrying amount 13,727 13,727
Net carrying amount $ 11,558 11,612
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 (1,784) (1,746)
Net carrying amount, excluding goodwill $ 429 467
Third-party originators intangible    
Acquired Finite-Lived Intangible Assets [Line Items]    
Amortization Period 7 years  
Gross carrying amount, excluding goodwill $ 483 483
Accumulated amortization (385) (369)
Net carrying amount, excluding goodwill $ 98 $ 114