XML 33 R19.htm IDEA: XBRL DOCUMENT
v3.20.2

DIVIDENDS DECLARED PER SHARE (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2020
DIVIDENDS DECLARED PER SHARE [Abstract] |
Schedule of Dividends Declared |
Declaration Date |  | Date Paid (Payable) |  | Shareholder of Record Date |  | Dividend Amount
10/28/20 |  | 11/30/20 |  | 11/16/20 |  | $ 0.375
07/29/20 |  | 08/28/20 |  | 08/14/20 |  | $ 0.375
04/29/20 |  | 05/29/20 |  | 05/15/20 |  | $ 0.375
01/29/20 |  | 02/28/20 |  | 02/14/20 |  | $ 0.375
10/23/19 |  | 11/27/19 |  | 11/13/19 |  | $ 0.370
07/24/19 |  | 08/29/19 |  | 08/15/19 |  | $ 0.370
04/24/19 |  | 05/29/19 |  | 05/15/19 |  | $ 0.370
01/30/19 |  | 02/28/19 |  | 02/14/19 |  | $ 0.370

X
- Definition Tabular disclosure of information related to dividends declared, including paid and unpaid dividends. + References No definition available. + Details
Name: | us-gaap_DividendsDeclaredTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | utl_DividendsDeclaredPerShareAbstract
Namespace Prefix: | utl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration