XML 33 R37.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Quarterly Financial Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Quarterly Financial Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Operating Revenues | $ 119.8 us-gaap_RegulatedAndUnregulatedOperatingRevenue | $ 76.6 us-gaap_RegulatedAndUnregulatedOperatingRevenue | $ 73.3 us-gaap_RegulatedAndUnregulatedOperatingRevenue | $ 156.1 us-gaap_RegulatedAndUnregulatedOperatingRevenue | $ 109.8 us-gaap_RegulatedAndUnregulatedOperatingRevenue | $ 72.5 us-gaap_RegulatedAndUnregulatedOperatingRevenue | $ 66.4 us-gaap_RegulatedAndUnregulatedOperatingRevenue | $ 118.2 us-gaap_RegulatedAndUnregulatedOperatingRevenue | $ 425.8 us-gaap_RegulatedAndUnregulatedOperatingRevenue | $ 366.9 us-gaap_RegulatedAndUnregulatedOperatingRevenue | $ 353.1 us-gaap_RegulatedAndUnregulatedOperatingRevenue
Operating Income | 20.1 us-gaap_OperatingIncomeLoss | 7.4 us-gaap_OperatingIncomeLoss | 7.1 us-gaap_OperatingIncomeLoss | 25.4 us-gaap_OperatingIncomeLoss | 21.5 us-gaap_OperatingIncomeLoss | 5.6 us-gaap_OperatingIncomeLoss | 4.5 us-gaap_OperatingIncomeLoss | 21.9 us-gaap_OperatingIncomeLoss | 60.0 us-gaap_OperatingIncomeLoss | 53.5 us-gaap_OperatingIncomeLoss | 47.5 us-gaap_OperatingIncomeLoss
Net Income (Loss) Applicable to Common | $ 9.4 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 1.6 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 1.1 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 12.6 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 10.3 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 0.6 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ (0.1)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 10.8 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 24.7 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 21.6 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 18.1 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Per Share Data: |  |  |  |  |  |  |  |  |  |  |
Earnings Per Common Share | $ 0.69 us-gaap_EarningsPerShareBasicAndDiluted | $ 0.11 us-gaap_EarningsPerShareBasicAndDiluted | $ 0.08 us-gaap_EarningsPerShareBasicAndDiluted | $ 0.91 us-gaap_EarningsPerShareBasicAndDiluted | $ 0.75 us-gaap_EarningsPerShareBasicAndDiluted | $ 0.04 us-gaap_EarningsPerShareBasicAndDiluted | $ (0.01)us-gaap_EarningsPerShareBasicAndDiluted | $ 0.79 us-gaap_EarningsPerShareBasicAndDiluted | $ 1.79 us-gaap_EarningsPerShareBasicAndDiluted | $ 1.57 us-gaap_EarningsPerShareBasicAndDiluted | $ 1.43 us-gaap_EarningsPerShareBasicAndDiluted
Dividends Paid Per Common Share | $ 0.345 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.345 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.345 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.345 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.345 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.345 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.345 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.345 us-gaap_CommonStockDividendsPerShareCashPaid | $ 1.38 us-gaap_CommonStockDividendsPerShareCashPaid | $ 1.38 us-gaap_CommonStockDividendsPerShareCashPaid | $ 1.38 us-gaap_CommonStockDividendsPerShareCashPaid

X
- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
Name: | us-gaap_CommonStockDividendsPerShareCashPaid
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_EarningsPerShareAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. + References No definition available. + Details
Name: | us-gaap_EarningsPerShareBasicAndDiluted
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1377-109256 + Details
Name: | us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The net result for the period of deducting operating expenses from operating revenues. + References No definition available. + Details
Name: | us-gaap_OperatingIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The total amount of operating revenues recognized during the period. + References No definition available. + Details
Name: | us-gaap_RegulatedAndUnregulatedOperatingRevenue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | utl_QuarterlyFinancialInformationLineItems
Namespace Prefix: | utl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration