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Income Taxes (Details 2) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Utility Plant Related	$ 41,912	$ 39,020
Customer Advances	(3,598)	(3,673)
Employee Benefits	1,121	6,523
Investment Tax Credits (ITC)	989	1,068
Other	(325)	(94)
Total Deferred Tax Liability and ITC	$ 40,099	$ 42,844

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences derived customer advances.

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Amount before allocation of valuation allowances of deferred tax liabilities attributable to deductible investment tax credits.

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Amount of deferred tax liability attributable to taxable temporary differences of utility plant related.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences not separately disclosed.

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