XML 40 R1.htm IDEA: XBRL DOCUMENT v3.21.4
Cover
Jan. 25, 2022
Oct. 26, 2021
Aug. 26, 2021
Cover [Abstract]      
Document Type 8-K    
Document Period End Date Jan. 25, 2022    
Entity Registrant Name TriCo Bancshares    
Entity Incorporation, State or Country Code CA    
Entity File Number 0-10661    
Entity Tax Identification Number 94-2792841    
Entity Address, Address Line One   63 Constitution Drive  
Entity Address, City or Town Chico,    
Entity Address, Postal Zip Code 95973    
City Area Code 530    
Local Phone Number 898-0300    
Written Communications false    
Soliciting Material false    
Pre-commencement Tender Offer false    
Pre-commencement Issuer Tender Offer false    
Title of 12(b) Security Common Stock, no par value    
Trading Symbol TCBK    
Security Exchange Name NASDAQ    
Entity Emerging Growth Company false    
Amendment Flag false    
Entity Central Index Key 0000356171    
Entity Address, State or Province     CA