Cover
Cover | Oct. 26, 2020 | Jul. 29, 2020 | Sep. 30, 2020 | Mar. 31, 2020 |
Cover [Abstract] | ||||
Document Type | 8-K | |||
Document Period End Date | Oct. 26, 2020 | |||
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, State or Province | CA | |||
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 |