Quarterly Operating Results - Unaudited (Tables)

12 Months Ended

Dec. 31, 2013

Quarterly Financial Information Disclosure [Abstract]

Quarterly financial information

Operating results for each quarter of 2013 and 2012 are as follows:

	(Thousands of Dollars, Except per Share Data)
2013	1st		2nd		3rd		4th		Total
Operating Revenues	$	27,038	$	29,102	$	31,285	$	27,421	$	114,846
Operating Income		5,865		8,171		10,270		6,664		30,970
Net Income		3,177		4,481		5,807		3,168		16,633
Basic Earnings per Share	$	0.20	$	0.28	$	0.36	$	0.20	$	1.04
Diluted Earnings per Share	$	0.20	$	0.28	$	0.36	$	0.19	$	1.03

2012	1st		2nd		3rd		4th		Total
Operating Revenues	$	23,546	$	27,401	$	32,353	$	27,079	$	110,379
Operating Income		3,877		7,210		10,843		5,717		27,647
Net Income		1,807		3,725		6,138		2,726		14,396
Basic Earnings per Share	$	0.11	$	0.23	$	0.39	$	0.17	$	0.90
Diluted Earnings per Share	$	0.11	$	0.23	$	0.39	$	0.17	$	0.90