CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues
Electric	$ 200,472	$ 196,176	$ 410,564	$ 403,231
Gas	59,362	48,101	161,880	149,847
Other	327	326	737	625
Total Revenues	260,161	244,603	573,181	553,703
Operating Expenses
Cost of sales	106,913	96,427	239,109	234,823
Operating, general and administrative	67,364	67,096	136,201	132,669
Property and other taxes	25,810	25,934	51,569	49,599
Depreciation	27,414	26,426	56,632	52,859
Total Operating Expenses	227,501	215,883	483,511	469,950
Operating Income	32,660	28,720	89,670	83,753
Interest Expense, net	(17,141)	(15,893)	(33,920)	(31,855)
Other Income	928	1,176	3,643	2,160
Income Before Income Taxes	16,447	14,003	59,393	54,058
Income Tax Expense	(2,106)	(2,565)	(7,150)	(10,577)
Net Income (Loss)	$ 14,341	$ 11,438	$ 52,243	$ 43,481
Average Common Shares Outstanding	38,092,292	36,634,653	37,740,316	36,481,506
Basic Earnings per Average Common Share	$ 0.37	$ 0.31	$ 1.38	$ 1.19
Diluted Earnings per Average Common Share	$ 0.37	$ 0.31	$ 1.38	$ 1.19
Dividends Declared per Average Common Share	$ 0.38	$ 0.37	$ 0.76	$ 0.74