SEGMENT INFORMATION (Tables)

9 Months Ended

Sep. 30, 2013

Segment Reporting [Abstract]

Schedule of Segment Reporting Information

Operating expenses are provided by segment in order to reconcile to operating income as reported in the consolidated financial statements (dollars in thousands): 

Three Months Ended
September 30, 2013
	NVE Consolidated			NVE Other			NPC Electric			SPPC Total			SPPC Electric			SPPC Gas
Operating Revenues	$	1,013,151		$	3		$	786,142		$	227,006		$	213,463		$	13,543
Energy Costs:
Fuel for power generation	217,954			—			163,127			54,827			54,827			—
Purchased power	205,970			—			172,582			33,388			33,388			—
Gas purchased for resale	7,383			—			—			7,383			—			7,383
Deferred energy	(55,270		)	—			(45,381		)	(9,889		)	(7,925		)	(1,964		)
Energy efficiency program costs	16,042			—			13,998			2,044			2,044			—
Regulatory disallowance	17,335			—			11,866			5,469			5,469			—
Total Costs	$	409,414		$	—		$	316,192		$	93,222		$	87,803		$	5,419
Gross Margin	$	603,737		$	3		$	469,950		$	133,784		$	125,660		$	8,124
Merger-related costs	7,857			229			5,620			2,008
Other operating expenses	106,068			830			70,844			34,394
Maintenance	17,176			—			11,208			5,968
Depreciation and amortization	96,801			—			68,849			27,952
Taxes other than income	14,214			57			8,213			5,944
Operating Income (Loss)	$	361,621		$	(1,113	)	$	305,216		$	57,518

Nine Months Ended
September 30, 2013
	NVE Consolidated			NVE Other			NPC Electric			SPPC Total			SPPC Electric			SPPC Gas
Operating Revenues	$	2,329,011		$	10		$	1,695,129		$	633,872		$	560,392		$	73,480
Energy Costs:
Fuel for power generation	554,181			—			412,904			141,277			141,277			—
Purchased power	498,141			—			383,386			114,755			114,755			—
Gas purchased for resale	62,277			—			—			62,277			—			62,277
Deferred energy	(221,022		)	—			(154,484		)	(66,538		)	(44,223		)	(22,315		)
Energy efficiency program costs	38,486			—			32,807			5,679			5,679			—
Regulatory disallowance	17,335			—			11,866			5,469			5,469			—
Total Costs	$	949,398		$	—		$	686,479		$	262,919		$	222,957		$	39,962
Gross Margin	$	1,379,613		$	10		$	1,008,650		$	370,953		$	337,435		$	33,518
Merger-related costs	21,409			1,394			14,487			5,528
Other operating expenses	317,538			2,747			208,336			106,455
Maintenance	66,128			—			45,172			20,956
Depreciation and amortization	291,687			—			207,915			83,772
Taxes other than income	46,536			318			27,804			18,414
Operating Income (Loss)	$	636,315		$	(4,449	)	$	504,936		$	135,828

Three Months Ended
September 30, 2012
	NVE Consolidated			NVE Other			NPC Electric			SPPC Total			SPPC Electric			SPPC Gas
Operating Revenues	$	1,026,488		$	4		$	802,334		$	224,150		$	212,073		$	12,077
Energy Costs:
Fuel for power generation	171,316			—			123,992			47,324			47,324			—
Purchased power	205,686			—			171,687			33,999			33,999			—
Gas purchased for resale	5,382			—			—			5,382			—			5,382
Deferred energy	(29,036		)	—			(22,685		)	(6,351		)	(5,498		)	(853		)
Energy efficiency program costs	32,584			—			28,492			4,092			4,092			—
Total Costs	$	385,932		$	—		$	301,486		$	84,446		$	79,917		$	4,529
Gross Margin	$	640,556		$	4		$	500,848		$	139,704		$	132,156		$	7,548
Other operating expenses	100,108			608			65,372			34,128
Maintenance	19,014			—			12,533			6,481
Depreciation and amortization	94,512			—			66,975			27,537
Taxes other than income	15,682			45			9,743			5,894
Operating Income (Loss)	$	411,240		$	(649	)	$	346,225		$	65,664

Nine Months Ended
September 30, 2012
	NVE Consolidated			NVE Other			NPC Electric			SPPC Total			SPPC Electric			SPPC Gas
Operating Revenues	$	2,378,606		$	12		$	1,751,165		$	627,429		$	549,886		$	77,543
Energy Costs:
Fuel for power generation	400,936			—			285,799			115,137			115,137			—
Purchased power	486,894			—			388,494			98,400			98,400			—
Gas purchased for resale	46,491			—			—			46,491			—			46,491
Deferred Energy	(30,285		)	—			(15,461		)	(14,824		)	(13,854		)	(970		)
Energy efficiency program costs	76,609			—			65,466			11,143			11,143			—
Total Costs	$	980,645		$	—		$	724,298		$	256,347		$	210,826		$	45,521
Gross Margin	$	1,397,961		$	12		$	1,026,867		$	371,082		$	339,060		$	32,022
Other operating expenses	307,080			2,382			200,484			104,214
Maintenance	76,190			—			52,594			23,596
Depreciation and amortization	281,690			—			201,096			80,594
Taxes other than income	44,457			282			26,793			17,382
Operating Income (Loss)	$	688,544		$	(2,652	)	$	545,900		$	145,296