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LONG-TERM DEBT (Tables)
9 Months Ended
Sep. 30, 2012
Debt Disclosure [Abstract]  
Schedule of Maturities of Long-term Debt [Table Text Block]
    NVE NVE        
     Consolidated  Holding Co. NPC SPPC 
 2012(1)$(371) $ - $ (400) $29 
 2013 256,585   -  6,517  250,068 
 2014 324,153  195,000  129,142  11 
 2015 251,579   -  251,567  12 
 2016 661,682   -  211,677  450,005 
  Total Debt 2012-2016 1,493,628  195,000  598,503  700,125 
 Thereafter 3,529,214  315,000  2,747,784  466,430 
  Total Debt Before Unamortized Premium (Discount) 5,022,842  510,000  3,346,287  1,166,555 
 Unamortized Premium (Discount) Amount 1,745  0  (10,076)  11,821 
  Total Debt$5,024,587 $510,000 $3,336,211 $1,178,376 
                
  (1)Amounts may differ from current portion of long-term debt as reported on the consolidated balance sheet due to the timing difference of payments and the change in obligation.