CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($) $ / shares shares	Jun. 30, 2014 USD ($) $ / shares shares	Jun. 30, 2015 USD ($) $ / shares shares	Jun. 30, 2014 USD ($) $ / shares shares
Operating Revenues:
Utility	$ 75,294	$ 68,903	$ 341,824	$ 279,232
Nonutility	102,416	64,368	218,838	204,240
Total Operating Revenues	177,710	133,271	560,662	483,472
Cost of Sales - (Excluding depreciation)
- Utility	24,901	24,623	169,875	127,700
- Nonutility	66,044	54,324	162,777	179,385
Operations	33,802	30,652	75,663	70,002
Maintenance	3,928	3,181	7,926	6,440
Depreciation	17,430	15,495	34,249	30,486
Energy and Other Taxes	1,265	1,241	3,461	3,194
Total Operating Expenses	147,370	129,516	453,951	417,207
Operating Income	30,340	3,755	106,711	66,265
Other Income and Expense	3,040	4,185	5,281	6,553
Interest Charges	(7,474)	(6,846)	(16,075)	(13,930)
Income Before Income Taxes	25,906	1,094	95,917	58,888
Income Taxes	3,279	9,510	(13,334)	(2,359)
Equity in Loss of Affiliated Companies	(15,844)	(903)	(15,389)	1,383
Income from Continuing Operations	13,341	9,701	67,194	57,912
Loss from Discontinued Operations - (Net of tax benefit)	(74)	(80)	(350)	(393)
Net Income	$ 13,267	$ 9,621	$ 66,844	$ 57,519
Basic Earnings Per Common Share:
Continuing Operations (in dollars per share) | $ / shares	$ 0.19	$ 0.15	$ 0.98	$ 0.88
Discontinued Operations (in dollars per share) | $ / shares	0.00	0.00	0.00	0.00
Basic Earnings Per Common Share (in dollars per share) | $ / shares	$ 0.19	$ 0.15	$ 0.98	$ 0.88
Average Shares of Common Stock Outstanding - Basic (in shares) | shares	68,467	65,926	68,432	65,728
Diluted Earnings Per Common Share:
Continuing Operations (in dollars per share) | $ / shares	$ 0.19	$ 0.15	$ 0.98	$ 0.88
Discontinued Operations (in dollars per share) | $ / shares	0.00	0.00	0.00	0.00
Diluted Earnings Per Common Share (in dollars per share) | $ / shares	$ 0.19	$ 0.15	$ 0.98	$ 0.88
Average Shares of Common Stock Outstanding - Diluted (in shares) | shares	68,653	66,074	68,636	65,880
Dividends Declared Per Common Share (in dollars per share) | $ / shares	$ 0.25	$ 0.24	$ 0.50	$ 0.47