QUARTERLY FINANCIAL DATA (UNAUDITED)

12 Months Ended

Dec. 31, 2012

Quarterly Financial Data [Abstract]

Quarterly Financial Information [Text Block]

NOTE 16.         HYPERLINK \l "Findata"QUARTERLY FINANCIAL DATA (UNAUDITED)

The following figures are unaudited and include all adjustments necessary in the opinion of management for a fair presentation of the results of interim periods.  Dollars are presented in thousands except per share amounts.

NVE

		2012 Quarter Ended
		March		June		September		December
Operating Revenues		$	611,420	$	740,698	$	1,026,488	$	600,571
Operating Income		$	96,468	$	180,836	$	411,240	$	96,519
Net Income		$	12,173	$	69,439	$	223,170	$	17,164
Net Income per Share
	Basic(1)	$	0.05	$	0.29	$	0.95	$	0.07
	Diluted	$	0.05	$	0.29	$	0.94	$	0.07

		2011 Quarter Ended
		March		June		September		December
Operating Revenues		$	640,983	$	674,931	$	1,017,796	$	609,597
Operating Income		$	73,866	$	106,919	$	353,196	$	76,684
Net Income (Loss)		$	2,330	$	12,888	$	173,462	$	(25,248)
Net Income (Loss) per Share
	Basic -	$	0.01	$	0.05	$	0.74	$	(0.11)
	Diluted(1)	$	0.01	$	0.05	$	0.73	$	(0.11)

NPC		2012 Quarter Ended
		March		June		September		December
	Operating Revenues	$	395,688	$	553,143	$	802,334	$	394,076
	Operating Income	$	52,684	$	146,991	$	346,225	$	56,395
	Net Income (Loss)	$	(1,316)	$	62,297	$	195,170	$	1,587

	2011 Quarter Ended
	March		June		September		December
Operating Revenues	$	390,068	$	473,898	$	798,914	$	391,513
Operating Income	$	31,533	$	82,177	$	296,327	$	33,759
Net Income (Loss)	$	(9,020)	$	16,063	$	154,608	$	(29,065)

SPPC
		2012 Quarter Ended
		March		June		September		December
	Operating Revenues	$	215,728	$	187,551	$	224,150	$	206,491
	Operating Income	$	44,679	$	34,953	$	65,664	$	42,854
	Net Income	$	18,644	$	12,679	$	34,427	$	18,604

	2011 Quarter Ended
	March		June		September		December
Operating Revenues	$	250,911	$	201,030	$	218,878	$	218,080
Operating Income	$	43,149	$	25,703	$	57,574	$	45,007
Net Income	$	16,576	$	3,512	$	25,336	$	14,462