Document and Entity Information
Document and Entity Information | Jun. 21, 2021 |
Cover [Abstract] | |
Document Type | 8-K |
Document Period End Date | Jun. 21, 2021 |
Entity Registrant Name | UNITIL CORP |
Entity Incorporation, State or Country Code | NH |
Entity File Number | 1-8858 |
Entity Tax Identification Number | 02-0381573 |
Entity Address, Address Line One | 6 Liberty Lane West |
Entity Address, City or Town | Hampton |
Entity Address, State or Province | NH |
Entity Address, Postal Zip Code | 03842-1720 |
City Area Code | 603 |
Local Phone Number | 772-0775 |
Written Communications | false |
Soliciting Material | false |
Pre-commencement Tender Offer | false |
Pre-commencement Issuer Tender Offer | false |
Title of 12(b) Security | Common Stock |
Trading Symbol | UTL |
Security Exchange Name | NYSE |
Entity Emerging Growth Company | false |
Amendment Flag | false |
Entity Central Index Key | 0000755001 |