v3.25.4
Investment Securities and Other Investments - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2025
Schedule Of Investments [Line Items]    
Federal home loan bank stock $ 9,400 $ 9,100
Federal reserve bank stock 9,400 9,400
Correspondent bank stock 500 500
Unrealized gain position 1,100 42,400
Other equity investments 4,800 4,900
Impairment charge 8,500  
Other Investments, Total 19,405 20,781
Asset Pledged as Collateral without Right [Member] | FHLB [Member]    
Schedule Of Investments [Line Items]    
Securities pledged 268,900 174,300
Asset Pledged as Collateral without Right [Member] | FRB [Member]    
Schedule Of Investments [Line Items]    
Securities pledged 16,300 0
Third Party Investment Grade [Member]    
Schedule Of Investments [Line Items]    
Securities pledged $ 29,300 $ 23,500