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Junior Subordinated Debt - Additional Information (Detail)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
USD ($)
trust
office
Dec. 31, 2023
USD ($)
Class of Stock [Line Items]    
Number of subsidiary business trusts (in trusts) | trust 5  
Preferred stock, value issued | $ $ 0 $ 0
Interest deferral period 5 years  
Number of loan production offices (in offices) | office 2  
VRB Subordinated - 5% | Senior Subordinated Notes    
Class of Stock [Line Items]    
Interest rate 5.00%  
Current Coupon Rate 5.00%  
Basis spread on variable rate 4.90%  
North Valley Bancorp    
Class of Stock [Line Items]    
Number of subsidiary business trusts (in trusts) | trust 3  
Wholly owned subsidiaries    
Class of Stock [Line Items]    
Preferred stock, value issued | $ $ 62,900