Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Other Intangibles - Additional Information (Detail)

v3.21.2
Goodwill and Other Intangibles - Additional Information (Detail) - USD ($)
6 Months Ended 12 Months Ended
Oct. 27, 2016
Aug. 31, 2014
Jun. 30, 2021
Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]        
Impairment of goodwill and other intangible assets       $ 0
Goodwill and other intangible assets triggering event     No triggering event has occurred subsequent to December 31, 2020 that would require a reassessment of goodwill and other intangible assets.  
CBI Merger        
Finite-Lived Intangible Assets [Line Items]        
Goodwill $ 11,000,000.0      
CBI Merger | Third-party originators intangible        
Finite-Lived Intangible Assets [Line Items]        
Intangible assets acquired $ 483,000      
CBI Merger | Core deposit intangible        
Finite-Lived Intangible Assets [Line Items]        
Intangible assets acquired   $ 2,200,000