LONG-TERM DEBT (Tables)

9 Months Ended

Sep. 30, 2013

Debt Disclosure [Abstract]

Schedule of Long-term Debt

NVE’s, NPC’s and SPPC’s long-term debt consists of the following (dollars in thousands):  

				September 30,											December 31,
				2013											2012
Long-Term Debt:	Stated Rate		Maturity Date	Consolidated			NVE Holding Co.		NPC			SPPC			Consolidated			NVE Holding Co.		NPC			SPPC
Secured Debt
General and Refunding Mortgage Securities
NPC Series L	5.875	%	2015	$	250,000		$	—	$	250,000		$	—		$	250,000		$	—	$	250,000		$	—
NPC Series M	5.950	%	2016	210,000			—		210,000			—			210,000			—		210,000			—
NPC Series N	6.650	%	2036	370,000			—		370,000			—			370,000			—		370,000			—
NPC Series O	6.500	%	2018	325,000			—		325,000			—			325,000			—		325,000			—
NPC Series R	6.750	%	2037	350,000			—		350,000			—			350,000			—		350,000			—
NPC Series S	6.500	%	2018	500,000			—		500,000			—			500,000			—		500,000			—
NPC Series U	7.375	%	2014	125,000			—		125,000			—			125,000			—		125,000			—
NPC Series V	7.125	%	2019	500,000			—		500,000			—			500,000			—		500,000			—
NPC Series X	5.375	%	2040	250,000			—		250,000			—			250,000			—		250,000			—
NPC Series Y	5.450	%	2041	250,000			—		250,000			—			250,000			—		250,000			—
SPPC Series M	6.000	%	2016	450,000			—		—			450,000			450,000			—		—			450,000
SPPC Series P	6.750	%	2037	251,742			—		—			251,742			251,742			—		—			251,742
SPPC Series Q	5.450	%	2013	—			—		—			—			250,000			—		—			250,000
SPPC Series T	3.375	%	2023	250,000			—		—			250,000			—			—		—			—
Variable Rate Debt (Secured by General and Refunding Mortgage Securities)
NPC IDRB Series 2000A			2020	—			—		—			—			98,100			—		98,100			—
NPC PCRB Series 2006			2036	37,700			—		37,700			—			37,700			—		37,700			—
NPC PCRB Series 2006A			2032	37,975			—		37,975			—			37,975			—		37,975			—
SPPC PCRB Series 2006A			2031	58,200			—		—			58,200			58,200			—		—			58,200
SPPC PCRB Series 2006B			2036	75,000			—		—			75,000			75,000			—		—			75,000
SPPC PCRB Series 2006C			2036	81,475			—		—			81,475			81,475			—		—			81,475
Senior Notes
NVE Senior Notes	6.250	%	2020	315,000			315,000		—			—			315,000			315,000		—			—
NVE Term Loan	2.560	%	2014	195,000			195,000		—			—			195,000			195,000		—			—
Obligations under capital leases				38,415			—		36,571			1,844			44,258			—		42,908			1,350
Unamortized bond premium and discount (net)				759			—		(9,080		)	9,839			1,631			—		(9,827		)	11,458
Current maturities				(129,457		)	—		(129,186		)	(271		)	(356,283		)	—		(106,048		)	(250,235		)
Total Long-Term Debt				$	4,791,809		$	510,000	$	3,103,980		$	1,177,829		$	4,669,798		$	510,000	$	3,230,808		$	928,990