Junior Subordinated Debt - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) trust location	Mar. 25, 2022 USD ($)	Dec. 31, 2021 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 | LIBOR PLUS
Class of Stock [Line Items]
Basis spread on variable rate	3.52%
VRB Subordinated - 6% | Senior Subordinated Loans | SOFR
Class of Stock [Line Items]
Basis spread on variable rate	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