Document And Entity Information
Document And Entity Information | Jan. 22, 2025 |
Cover [Abstract] | |
Document Type | 8-K |
Amendment Flag | false |
Document Period End Date | Jan. 22, 2025 |
Entity Registrant Name | Financial Institutions, Inc. |
Entity Central Index Key | 0000862831 |
Entity Emerging Growth Company | false |
Entity File Number | 0-26481 |
Entity Incorporation, State or Country Code | NY |
Entity Tax Identification Number | 16-0816610 |
Entity Address, Address Line One | 220 Liberty Street |
Entity Address, City or Town | Warsaw |
Entity Address, State or Province | NY |
Entity Address, Postal Zip Code | 14569 |
City Area Code | 585 |
Local Phone Number | 786-1100 |
Entity Information, Former Legal or Registered Name | Not Applicable |
Written Communications | false |
Soliciting Material | false |
Pre-commencement Tender Offer | false |
Pre-commencement Issuer Tender Offer | false |
Title of 12(b) Security | Common stock, par value $0.01 per share |
Trading Symbol | FISI |
Security Exchange Name | NASDAQ |