Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-22-137544-index-headers.html | 2022-05-03 06:56:32 | |
| 0001193125-22-137544-index.html | 2022-05-03 06:56:32 | |
| 0001193125-22-137544.txt | 2022-05-03 06:56:32 | |
 0001193125-22-137544-xbrl.zip | 228544 | 2022-05-03 06:56:32 |
| d257646d10q.htm | 1825455 | 2022-05-03 06:56:32 |
| d257646d10q_htm.xml | 1935620 | 2022-05-03 06:56:32 |
| d257646dex11.htm | 8834 | 2022-05-03 06:56:32 |
| d257646dex311.htm | 10701 | 2022-05-03 06:56:32 |
| d257646dex312.htm | 10181 | 2022-05-03 06:56:32 |
| d257646dex313.htm | 10599 | 2022-05-03 06:56:32 |
| d257646dex321.htm | 6673 | 2022-05-03 06:56:32 |
| d257646dex991.htm | 75648 | 2022-05-03 06:56:32 |
| FilingSummary.xml | 31843 | 2022-05-03 06:56:32 |
| Financial_Report.xlsx | 90502 | 2022-05-03 06:56:32 |
 g257646unitil.jpg | 14559 | 2022-05-03 06:56:32 |
| MetaLinks.json | 712743 | 2022-05-03 06:56:32 |
| R1.htm | 52554 | 2022-05-03 06:56:32 |
| R10.htm | 81250 | 2022-05-03 06:56:32 |
| R11.htm | 153217 | 2022-05-03 06:56:32 |
| R12.htm | 27430 | 2022-05-03 06:56:32 |
| R13.htm | 46814 | 2022-05-03 06:56:32 |
| R14.htm | 28703 | 2022-05-03 06:56:32 |
| R15.htm | 26699 | 2022-05-03 06:56:32 |
| R16.htm | 64750 | 2022-05-03 06:56:32 |
| R17.htm | 230261 | 2022-05-03 06:56:32 |
| R18.htm | 170843 | 2022-05-03 06:56:32 |
| R19.htm | 11865 | 2022-05-03 06:56:32 |
| R2.htm | 55359 | 2022-05-03 06:56:32 |
| R20.htm | 77941 | 2022-05-03 06:56:32 |
| R21.htm | 147790 | 2022-05-03 06:56:32 |
| R22.htm | 14096 | 2022-05-03 06:56:32 |
| R23.htm | 20758 | 2022-05-03 06:56:32 |
| R24.htm | 17083 | 2022-05-03 06:56:32 |
| R25.htm | 55270 | 2022-05-03 06:56:32 |
| R26.htm | 42832 | 2022-05-03 06:56:32 |
| R27.htm | 33116 | 2022-05-03 06:56:32 |
| R28.htm | 5527 | 2022-05-03 06:56:32 |
| R29.htm | 13436 | 2022-05-03 06:56:32 |
| R3.htm | 141730 | 2022-05-03 06:56:32 |
| R30.htm | 8511 | 2022-05-03 06:56:32 |
| R31.htm | 11477 | 2022-05-03 06:56:32 |
| R32.htm | 23826 | 2022-05-03 06:56:32 |
| R33.htm | 15233 | 2022-05-03 06:56:32 |
| R34.htm | 16759 | 2022-05-03 06:56:32 |
| R35.htm | 11533 | 2022-05-03 06:56:32 |
| R36.htm | 27015 | 2022-05-03 06:56:32 |
| R37.htm | 43570 | 2022-05-03 06:56:32 |
| R38.htm | 74116 | 2022-05-03 06:56:32 |
| R39.htm | 64490 | 2022-05-03 06:56:32 |
| R4.htm | 6779 | 2022-05-03 06:56:32 |
| R40.htm | 6203 | 2022-05-03 06:56:32 |
| R41.htm | 59256 | 2022-05-03 06:56:32 |
| R42.htm | 12149 | 2022-05-03 06:56:32 |
| R43.htm | 21592 | 2022-05-03 06:56:32 |
| R44.htm | 41736 | 2022-05-03 06:56:32 |
| R45.htm | 78270 | 2022-05-03 06:56:32 |
| R46.htm | 22428 | 2022-05-03 06:56:32 |
| R47.htm | 136626 | 2022-05-03 06:56:32 |
| R48.htm | 11155 | 2022-05-03 06:56:32 |
| R49.htm | 16506 | 2022-05-03 06:56:32 |
| R5.htm | 82502 | 2022-05-03 06:56:32 |
| R50.htm | 14086 | 2022-05-03 06:56:32 |
| R51.htm | 32762 | 2022-05-03 06:56:32 |
| R52.htm | 17161 | 2022-05-03 06:56:32 |
| R53.htm | 35074 | 2022-05-03 06:56:32 |
| R54.htm | 12422 | 2022-05-03 06:56:32 |
| R6.htm | 25766 | 2022-05-03 06:56:32 |
| R7.htm | 7193 | 2022-05-03 06:56:32 |
| R8.htm | 182177 | 2022-05-03 06:56:32 |
| R9.htm | 12151 | 2022-05-03 06:56:32 |
| report.css | 2767 | 2022-05-03 06:56:32 |
| Show.js | 1085 | 2022-05-03 06:56:32 |
| utl-20220331.xsd | 66250 | 2022-05-03 06:56:32 |
| utl-20220331_cal.xml | 41790 | 2022-05-03 06:56:32 |
| utl-20220331_def.xml | 433757 | 2022-05-03 06:56:32 |
| utl-20220331_lab.xml | 508298 | 2022-05-03 06:56:32 |
| utl-20220331_pre.xml | 465267 | 2022-05-03 06:56:32 |