CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues
Electric	$ 227,103	$ 202,485	$ 637,667	$ 605,716
Gas	34,772	32,965	196,652	182,812
Other	373	416	1,110	1,041
Total Revenues	262,248	235,866	835,429	789,569
Operating Expenses
Cost of sales	104,298	93,061	343,407	327,884
Operating, general and administrative	72,540	63,056	208,741	195,725
Mountain States Transmission Intertie impairment	0	24,039	0	24,039
Property and other taxes	25,956	24,796	77,525	74,395
Depreciation	28,053	26,505	84,685	79,364
Total Operating Expenses	230,847	231,457	714,358	701,407
Operating Income	31,401	4,409	121,071	88,162
Interest Expense, net	(17,056)	(17,743)	(50,976)	(49,598)
Other Income	3,117	974	6,760	3,134
Income Before Income Taxes	17,462	(12,360)	76,855	41,698
Income Tax Expense	(1,815)	8,588	(8,965)	(1,989)
Net Income (Loss)	$ 15,647	$ (3,772)	$ 67,890	$ 39,709
Average Common Shares Outstanding	38,459,484	37,201,051	37,982,673	36,723,105
Basic Earnings per Average Common Share	$ 0.41	$ (0.10)	$ 1.79	$ 1.09
Diluted Earnings per Average Common Share	$ 0.40	$ (0.10)	$ 1.78	$ 1.08
Dividends Declared per Common Share	$ 0.38	$ 0.37	$ 1.14	$ 1.11