Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Summary of Significant Accounting Policies [Abstract]

Schedule of Regulatory Assets and Liabilities [Text Block]

Regulatory assets and liabilities are comprised of the following:

(in thousands)	December 31,
	2012		2011
Assets:
Pension and postretirement benefits	$	21,341	$	17,829
Unrecovered income taxes and other	9,871		7,355
Deferred revenue (included in deferred charges)	3,644		3,883
Other (included in deferred charges)	3,151		2,464
Total regulatory assets	$	38,007	$	31,531
Liabilities:
Other (included in other current liabilities)	$	499	$	—
Unamortized Investment Tax Credits	1,490		1,313
Unfunded future income taxes and other	11,215		7,355
Total regulatory liabilities	$	13,204	$	8,668

Components of Addition to Net Utility Plant [Table Text Block]

The components that comprise Net Additions to Utility Plant during the last three years ending December 31 are as follows:

(in thousands)	2012		2011		2010
Additions to Utility Plant:
Company Financed	$	24,653	$	22,858	$	26,240
Allowance for Funds Used During Construction	239		188		171
Subtotal – Utility Plant Increase to Rate Base	24,892		23,046		26,411
Advances from Others for Construction	1,041		966		281
Net Additions to Utility Plant	$	25,933	$	24,012	$	26,692

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

EARNINGS PER SHARE – The following is a reconciliation of the numerators and denominators of the basic and diluted earnings per share for the years ended December 31:

Years ended December 31,	2012		2011		2010
Numerator (in thousands)
Basic Net Income Applicable to Common Stock	$	13,602	$	11,262	$	9,760
Diluted Net Income Applicable to Common Stock	$	13,602	$	11,262	$	9,760
Denominator (in thousands)
Basic Weighted Average Shares Outstanding	8,763		8,610		8,532
Dilutive Effect of Stock Awards	137		110		101
Diluted Weighted Average Shares Outstanding	8,900		8,720		8,633
Earnings per Share
Basic Earnings per Share	$	1.55	$	1.31	$	1.14
Dilutive Effect of Stock Awards	0.02		0.02		0.01
Diluted Earnings per Share	$	1.53	$	1.29	$	1.13