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Quarterly Operating Results - Unaudited (Tables)

12 Months Ended

Dec. 31, 2015

Quarterly Operating Results - Unaudited [Abstract]

Quarterly financial information

		(Thousands of Dollars, Except per Share Data)
2015		1st				2nd				3rd				4th				Total
Operating Revenues		$	28,780			$	31,666			$	34,654			$	30,925			$	126,025
Operating Income			6,685				9,235				11,460				8,460				35,840
Net Income			3,636				5,089				6,743				4,560				20,028
Basic Earnings per Share		$	0.22			$	0.31			$	0.41			$	0.29			$	1.23
Diluted Earnings per Share		$	0.22			$	0.31			$	0.41			$	0.28			$	1.22

2014		1st				2nd				3rd				4th				Total
Operating Revenues		$	27,173			$	29,190			$	32,669			$	28,107			$	117,139
Operating Income			5,967				8,747				11,620				8,058				34,392
Net Income			3,169				4,728				6,758				3,790				18,445
Basic Earnings per Share		$	0.20			$	0.29			$	0.42			$	0.23			$	1.14
Diluted Earnings per Share		$	0.20			$	0.29			$	0.42			$	0.22			$	1.13

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- References

No definition available.

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- Definition

Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 270
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)-(j)
-URI http://asc.fasb.org/extlink&oid=51825399&loc=d3e1280-108306

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