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Junior Subordinated Debt - Additional Information (Detail)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
USD ($)
location
trust
Dec. 31, 2022
USD ($)
Mar. 25, 2022
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 locations organized (in locations) | location 2    
Senior Subordinated Notes      
Class of Stock [Line Items]      
Face Value $ 98,889   $ 36,000
VRB Subordinated - 6% | Senior Subordinated Notes      
Class of Stock [Line Items]      
Face Value $ 16,000   16,000
Current Coupon Rate 6.00%    
Interest rate 6.00%    
VRB Subordinated - 6% | Senior Subordinated Loans      
Class of Stock [Line Items]      
Current Coupon Rate 6.00%    
Interest rate 5.00%    
VRB Subordinated - 6% | Senior Subordinated Loans | SOFR      
Class of Stock [Line Items]      
Basis spread on variable rate 3.52% 4.90%  
VRB Subordinated - 5% | Senior Subordinated Notes      
Class of Stock [Line Items]      
Face Value $ 20,000   $ 20,000
Current Coupon Rate 5.00%    
Interest rate 5.00%    
Wholly owned subsidiaries      
Class of Stock [Line Items]      
Preferred stock, value issued $ 63,000    
North Valley Bancorp      
Class of Stock [Line Items]      
Number of subsidiary business trusts (in trusts) | trust 3    
Number of locations acquired (in locations) | location 3