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Dividends Declared Per Share (Tables) | 6 Months Ended
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Jun. 30, 2012
Dividends Declared Per Share | NOTE 2 – DIVIDENDS DECLARED PER SHARE
Declaration Date |  | Date Paid (Payable) |  |  | Shareholder of Record Date |  |  | Dividend Amount |
6/6/12 |  |  | 08/15/12 |  |  |  | 08/01/12 |  |  | $ | 0.345 |
03/22/12 |  |  | 05/15/12 |  |  |  | 05/01/12 |  |  | $ | 0.345 |
01/17/12 |  |  | 02/15/12 |  |  |  | 02/01/12 |  |  | $ | 0.345 |
09/21/11 |  |  | 11/15/11 |  |  |  | 11/01/11 |  |  | $ | 0.345 |
06/16/11 |  |  | 08/15/11 |  |  |  | 08/01/11 |  |  | $ | 0.345 |
03/24/11 |  |  | 05/16/11 |  |  |  | 05/02/11 |  |  | $ | 0.345 |
01/18/11 |  |  | 02/15/11 |  |  |  | 02/01/11 |  |  | $ | 0.345 |

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- Definition Dividends Declared + References No definition available. + Details
Name: | utl_DividendsDeclaredTableTextBlock
Namespace Prefix: | utl_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration