Statements of Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenue	$ 254,027	$ 243,309	$ 245,631
Operating expenses:
Fuel and purchased power	89,437	87,519	93,222
Operations and maintenance	68,857	65,835	66,683
Gain on sale of operating assets	0	0	(768)
Depreciation and amortization	28,125	27,621	27,217
Taxes - property	5,264	4,753	4,557
Total operating expenses	191,683	185,728	190,911
Operating income	62,344	57,581	54,720
Other income (expense):
Interest expense	(19,725)	(17,602)	(16,712)
AFUDC - borrowed	186	161	419
Interest income	248	376	154
AFUDC - equity	368	325	705
Other expense	(196)	0	(344)
Other income	367	554	145
Total other income (expense)	(18,752)	(16,186)	(15,633)
Income from continuing operations before income taxes	43,592	41,395	39,087
Income tax expense	(13,419)	(14,309)	(11,990)
Net income	$ 30,173	$ 27,086	$ 27,097