XML 48 R35.htm IDEA: XBRL DOCUMENT v2.4.0.6
Variable Interest Entities (Details) (USD $)
 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Sep. 30, 2012
Public Service Company of New Mexico [Member]
Sep. 30, 2011
Public Service Company of New Mexico [Member]
Sep. 30, 2012
Public Service Company of New Mexico [Member]
Sep. 30, 2011
Public Service Company of New Mexico [Member]
Dec. 31, 2011
Public Service Company of New Mexico [Member]
Sep. 30, 2012
Valencia [Member]
Public Service Company of New Mexico [Member]
Sep. 30, 2011
Valencia [Member]
Public Service Company of New Mexico [Member]
Sep. 30, 2012
Valencia [Member]
Public Service Company of New Mexico [Member]
Sep. 30, 2011
Valencia [Member]
Public Service Company of New Mexico [Member]
Dec. 31, 2011
Valencia [Member]
Public Service Company of New Mexico [Member]
Sep. 30, 2012
Delta [Member]
Public Service Company of New Mexico [Member]
Sep. 30, 2011
Delta [Member]
Public Service Company of New Mexico [Member]
Sep. 30, 2012
Delta [Member]
Public Service Company of New Mexico [Member]
Sep. 30, 2011
Delta [Member]
Public Service Company of New Mexico [Member]
Sep. 30, 2012
Palo Verde Nuclear Generating Station [Member]
Public Service Company of New Mexico [Member]
Dec. 31, 2011
Palo Verde Nuclear Generating Station [Member]
Public Service Company of New Mexico [Member]
Sep. 30, 2012
Palo Verde Nuclear Generating Station [Member]
Property Lease Guarantee [Member]
Maximum [Member]
Public Service Company of New Mexico [Member]
May 30, 2008
Purchased Through May 30, 2028 [Member]
Valencia [Member]
Public Service Company of New Mexico [Member]
MW
Variable Interest Entity [Line Items]                                              
Number of mega watts purchased (in megawatts)                                             145
Long Term Contract For Purchase of Electric Power Fixed Costs                     $ 4,800,000 $ 4,600,000 $ 14,000,000 $ 13,700,000   $ 1,600,000 $ 1,500,000 $ 4,700,000 $ 4,500,000        
Long Term Contract For Purchase of Electric Power Variable Charges                     600,000 900,000 900,000 1,300,000   300,000 700,000 600,000 1,000,000        
Variable Interest Entity, Statement Of Operation [Abstract]                                              
Operating revenues                     5,358,000 5,505,000 14,916,000 15,024,000                  
Operating expenses                     (1,378,000) (1,394,000) (4,217,000) (4,260,000)                  
Earnings Attributable to non-controlling interest 3,980,000 4,111,000 10,699,000 10,764,000   3,980,000 4,111,000 10,699,000 10,764,000   3,980,000 4,111,000 10,699,000 10,764,000                  
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract]                                              
Current assets 472,412,000   472,412,000   462,819,000 398,485,000   398,485,000   459,621,000 3,507,000   3,507,000   2,405,000                
Net property, plant and equipment                     78,661,000   78,661,000   80,785,000                
Assets 5,260,207,000 5,372,640,000 5,260,207,000 5,372,640,000 5,204,613,000 4,073,331,000   4,073,331,000   4,095,287,000 82,168,000   82,168,000   83,190,000                
Current liabilities 392,991,000   392,991,000   373,268,000 233,436,000   233,436,000   290,563,000 1,080,000   1,080,000   767,000                
Owners' equity - non-controlling interest 81,088,000   81,088,000   82,423,000 81,088,000   81,088,000   82,423,000 81,088,000   81,088,000   82,423,000                
Operating Leases, Fixed Rate Percentage of Renewal Options After Original Lease Term               50.00%                              
Operating Leases, Renewal Options After Original Lease Term (in years)               2 years                              
Operating Leases, Extended Lease Term Option (in years)               6 years                              
Operating Leases, Future Minimum Payments Due                                       80,000,000      
Loss Contingency, Range of Possible Loss, Portion Not Accrued                                           167,600,000  
Operating Leases, Future Minimum Payments Due, Next Six Months                                       11,800,000      
Operating Leases, Future Minimum Payments Due, Current                                         26,000,000    
Long Term Contract for Purchase of Electric Power Aggregate Amount of Contract Remaining                               $ 46,700,000   $ 46,700,000