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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Operating Activities: |  |  |
Net Income | $ 27.1 | $ 26.3 | $ 24.7
Adjustments to Reconcile Net Income to Cash Provided by Operating Activities: |  |  |
Depreciation and Amortization | 46.6 | 45.7 | 42.1
Deferred Tax Provision | 15.4 | 11.9 | 14.4
Changes in Working Capital Items: |  |  |
Accounts Receivable | (5.4) | 10.9 | (8.5)
Accrued Revenue | (11.1) | 10.1 | 8.1
Regulatory Liabilities | (5.2) | 6.9 | (1.0)
Exchange Gas Receivable | 2.8 | 3.9 | (4.2)
Accounts Payable | (0.9) | (10.9) | 6.1
Other Changes in Working Capital Items | (1.0) | (2.4) | 6.5
Deferred Regulatory and Other Charges | (5.0) | 8.2 | (1.4)
Other, net | 5.0 | 4.5 | (2.8)
Cash Provided by Operating Activities | 68.3 | 115.1 | 84.0
Investing Activities: |  |  |
Property, Plant and Equipment Additions | (98.1) | (103.9) | (92.6)
Cash Used In Investing Activities | (98.1) | (103.9) | (92.6)
Financing Activities: |  |  |
Proceeds from (Repayment of) Short-Term Debt, net | 39.9 | 12.7 | (30.9)
Issuance of Long-Term Debt | 30.0 |  | 50.0
Repayment of Long-Term Debt | (19.0) | (7.4) | (4.4)
(Decrease) Increase in Capital Lease Obligations | (2.8) | 6.1 | 6.5
Net (Decrease) Increase in Exchange Gas Financing | (2.5) | (4.0) | 4.4
Dividends Paid | (20.0) | (19.6) | (19.2)
Proceeds from Issuance of Common Stock | 1.3 | 1.3 | 1.2
Cash Provided by (Used In) Financing Activities | 26.9 | (10.9) | 7.6
Net (Decrease) Increase in Cash | (2.9) | 0.3 | (1.0)
Cash at Beginning of Year | 8.7 | 8.4 | 9.4
Cash at End of Year | 5.8 | 8.7 | 8.4
Supplemental Information: |  |  |
Interest Paid | 22.1 | 22.3 | 20.8
Income Taxes Paid | 1.6 | 1.8 | 1.2
Payments on Capital Leases | 3.4 | 1.1 | 0.6
Capital Expenditures Included in Accounts Payable | 0.3 | $ 0.4 | $ 0.3
Non-Cash Additions to Property, Plant and Equipment | $ 3.5 |  |

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- Definition Amount of operating expense for depreciation and amortization of regulated operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(b)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The net change during the reporting period in deferred regulatory and other charges. + References No definition available. + Details
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Namespace Prefix: | utl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The net change during the reporting period in exchange gas financing. + References No definition available. + Details
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Namespace Prefix: | utl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Proceeds from (Repayments of) Debt and Capital Lease Obligations + References No definition available. + Details
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Namespace Prefix: | utl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration