Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Operating revenues:
Electric, natural gas distribution and regulated pipeline and energy services	$ 185,224	$ 184,793	$ 806,986	$ 863,569
Nonregulated pipeline and energy services, construction materials and contracting, construction services and other	1,095,276	1,028,410	2,322,078	2,202,960
Total operating revenues	1,280,500	1,213,203	3,129,064	3,066,529
Operating expenses:
Fuel and purchased power	20,616	19,236	63,761	66,826
Purchased natural gas sold	37,574	46,251	305,313	368,579
Cost of crude oil	69,122	0	116,174	0
Operation and maintenance:
Electric, natural gas distribution and regulated pipeline and energy services	68,386	69,100	207,396	200,298
Nonregulated pipeline and energy services, construction materials and contracting, construction services and other	884,328	875,343	1,962,318	1,923,509
Depreciation, depletion and amortization	57,817	50,698	164,969	151,342
Taxes, other than income	32,914	33,682	110,392	111,120
Total operating expenses	1,170,757	1,094,310	2,930,323	2,821,674
Operating income	109,743	118,893	198,741	244,855
Other income	3,498	2,524	6,261	7,162
Interest expense	22,946	22,402	69,864	64,832
Income before income taxes	90,295	99,015	135,138	187,185
Income taxes	36,895	35,376	52,520	63,072
Income from continuing operations	53,400	63,639	82,618	124,113
Income (loss) from discontinued operations, net of tax (Note 10)	(202,626)	38,482	(778,647)	87,475
Net income (loss)	(149,226)	102,121	(696,029)	211,588
Net loss attributable to noncontrolling interest	(9,778)	(1,088)	(21,060)	(2,390)
Dividends declared on preferred stocks	171	171	514	514
Earnings (loss) on common stock	$ (139,619)	$ 103,038	$ (675,483)	$ 213,464
Earnings (loss) per common share - basic:
Earnings before discontinued operations	$ 0.32	$ 0.33	$ 0.53	$ 0.66
Discontinued operations, net of tax	(1.04)	0.20	(4.00)	0.45
Earnings (loss) per common share - basic	(0.72)	0.53	(3.47)	1.11
Earnings (loss) per common share - diluted:
Earnings before discontinued operations	0.32	0.33	0.53	0.66
Discontinued operations, net of tax	(1.04)	0.20	(4.00)	0.45
Earnings (loss) per common share - diluted	(0.72)	0.53	(3.47)	1.11
Dividends declared per common share	$ 0.1825	$ 0.1775	$ 0.5475	$ 0.5325
Weighted average common shares outstanding - basic	195,151	193,949	194,814	191,958
Weighted average common shares outstanding - diluted	195,169	194,300	194,833	192,307