Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-19-023132-index-headers.html | 2019-01-31 07:02:34 | |
| 0001193125-19-023132-index.html | 2019-01-31 07:02:34 | |
| 0001193125-19-023132.txt | 2019-01-31 07:02:34 | |
 0001193125-19-023132-xbrl.zip | 302714 | 2019-01-31 07:02:34 |
| d599927d10k.htm | 1400798 | 2019-01-31 07:02:34 |
| d599927dex111.htm | 12054 | 2019-01-31 07:02:34 |
| d599927dex211.htm | 1361 | 2019-01-31 07:02:34 |
| d599927dex231.htm | 1826 | 2019-01-31 07:02:34 |
| d599927dex311.htm | 10358 | 2019-01-31 07:02:34 |
| d599927dex312.htm | 10319 | 2019-01-31 07:02:34 |
| d599927dex313.htm | 10329 | 2019-01-31 07:02:34 |
| d599927dex321.htm | 6531 | 2019-01-31 07:02:34 |
| d599927dex991.htm | 71930 | 2019-01-31 07:02:34 |
| FilingSummary.xml | 43676 | 2019-01-31 07:02:34 |
| Financial_Report.xlsx | 117086 | 2019-01-31 07:02:34 |
 g599927g29s68.jpg | 69306 | 2019-01-31 07:02:34 |
 g599927g62g77.jpg | 27957 | 2019-01-31 07:02:34 |
| R1.htm | 35717 | 2019-01-31 07:02:34 |
| R10.htm | 53815 | 2019-01-31 07:02:34 |
| R11.htm | 31254 | 2019-01-31 07:02:34 |
| R12.htm | 78146 | 2019-01-31 07:02:34 |
| R13.htm | 38844 | 2019-01-31 07:02:34 |
| R14.htm | 16332 | 2019-01-31 07:02:34 |
| R15.htm | 69226 | 2019-01-31 07:02:34 |
| R16.htm | 48697 | 2019-01-31 07:02:34 |
| R17.htm | 184404 | 2019-01-31 07:02:34 |
| R18.htm | 219530 | 2019-01-31 07:02:34 |
| R19.htm | 106607 | 2019-01-31 07:02:34 |
| R2.htm | 43709 | 2019-01-31 07:02:34 |
| R20.htm | 15295 | 2019-01-31 07:02:34 |
| R21.htm | 50725 | 2019-01-31 07:02:34 |
| R22.htm | 30151 | 2019-01-31 07:02:34 |
| R23.htm | 68253 | 2019-01-31 07:02:34 |
| R24.htm | 34655 | 2019-01-31 07:02:34 |
| R25.htm | 23438 | 2019-01-31 07:02:34 |
| R26.htm | 42096 | 2019-01-31 07:02:34 |
| R27.htm | 184521 | 2019-01-31 07:02:34 |
| R28.htm | 108284 | 2019-01-31 07:02:34 |
| R29.htm | 37592 | 2019-01-31 07:02:34 |
| R3.htm | 115222 | 2019-01-31 07:02:34 |
| R30.htm | 19002 | 2019-01-31 07:02:34 |
| R31.htm | 9423 | 2019-01-31 07:02:34 |
| R32.htm | 8137 | 2019-01-31 07:02:34 |
| R33.htm | 10934 | 2019-01-31 07:02:34 |
| R34.htm | 22735 | 2019-01-31 07:02:34 |
| R35.htm | 14567 | 2019-01-31 07:02:34 |
| R36.htm | 13469 | 2019-01-31 07:02:34 |
| R37.htm | 14643 | 2019-01-31 07:02:34 |
| R38.htm | 17316 | 2019-01-31 07:02:34 |
| R39.htm | 11447 | 2019-01-31 07:02:34 |
| R4.htm | 3176 | 2019-01-31 07:02:34 |
| R40.htm | 72762 | 2019-01-31 07:02:34 |
| R41.htm | 7327 | 2019-01-31 07:02:34 |
| R42.htm | 21901 | 2019-01-31 07:02:34 |
| R43.htm | 142038 | 2019-01-31 07:02:34 |
| R44.htm | 6019 | 2019-01-31 07:02:34 |
| R45.htm | 65765 | 2019-01-31 07:02:34 |
| R46.htm | 69884 | 2019-01-31 07:02:34 |
| R47.htm | 21724 | 2019-01-31 07:02:34 |
| R48.htm | 13200 | 2019-01-31 07:02:34 |
| R49.htm | 34917 | 2019-01-31 07:02:34 |
| R5.htm | 75011 | 2019-01-31 07:02:34 |
| R50.htm | 86351 | 2019-01-31 07:02:34 |
| R51.htm | 20081 | 2019-01-31 07:02:34 |
| R52.htm | 22816 | 2019-01-31 07:02:34 |
| R53.htm | 18758 | 2019-01-31 07:02:34 |
| R54.htm | 7079 | 2019-01-31 07:02:34 |
| R55.htm | 17906 | 2019-01-31 07:02:34 |
| R56.htm | 192044 | 2019-01-31 07:02:34 |
| R57.htm | 26069 | 2019-01-31 07:02:34 |
| R58.htm | 20677 | 2019-01-31 07:02:34 |
| R59.htm | 14855 | 2019-01-31 07:02:34 |
| R6.htm | 22164 | 2019-01-31 07:02:34 |
| R60.htm | 28895 | 2019-01-31 07:02:34 |
| R61.htm | 52719 | 2019-01-31 07:02:34 |
| R62.htm | 21374 | 2019-01-31 07:02:34 |
| R63.htm | 49641 | 2019-01-31 07:02:34 |
| R64.htm | 33414 | 2019-01-31 07:02:34 |
| R65.htm | 49271 | 2019-01-31 07:02:34 |
| R66.htm | 17458 | 2019-01-31 07:02:34 |
| R67.htm | 22780 | 2019-01-31 07:02:34 |
| R68.htm | 38137 | 2019-01-31 07:02:34 |
| R69.htm | 31451 | 2019-01-31 07:02:34 |
| R7.htm | 9560 | 2019-01-31 07:02:34 |
| R70.htm | 23656 | 2019-01-31 07:02:34 |
| R8.htm | 146598 | 2019-01-31 07:02:34 |
| R9.htm | 15843 | 2019-01-31 07:02:34 |
| report.css | 2767 | 2019-01-31 07:02:34 |
| Show.js | 1085 | 2019-01-31 07:02:34 |
| utl-20181231.xml | 2314522 | 2019-01-31 07:02:34 |
| utl-20181231.xsd | 90244 | 2019-01-31 07:02:34 |
| utl-20181231_cal.xml | 92434 | 2019-01-31 07:02:34 |
| utl-20181231_def.xml | 577235 | 2019-01-31 07:02:34 |
| utl-20181231_lab.xml | 748926 | 2019-01-31 07:02:34 |
| utl-20181231_pre.xml | 662157 | 2019-01-31 07:02:34 |