XML 45 R45.htm IDEA: XBRL DOCUMENT v2.4.0.6
Capitalization, Short-term Debt (Details) (USD $)
 6 Months Ended
Jun. 30, 2012
Extensions
Dec. 31, 2011
Jun. 30, 2011
Dec. 31, 2010
Jun. 30, 2012
Line of Credit [Member]
Dec. 31, 2011
Line of Credit [Member]
Jun. 30, 2012
PNM Resources [Member]
Revolving credit facility [Member]
Dec. 31, 2011
PNM Resources [Member]
Revolving credit facility [Member]
Jun. 30, 2012
PNM Resources [Member]
Bi-lateral line of credit [Member]
Dec. 31, 2011
PNM Resources [Member]
Bi-lateral line of credit [Member]
Jun. 30, 2012
Public Service Company of New Mexico [Member]
Dec. 31, 2011
Public Service Company of New Mexico [Member]
Jun. 30, 2011
Public Service Company of New Mexico [Member]
Dec. 31, 2010
Public Service Company of New Mexico [Member]
Jun. 30, 2012
Public Service Company of New Mexico [Member]
Revolving credit facility [Member]
Dec. 31, 2011
Public Service Company of New Mexico [Member]
Revolving credit facility [Member]
Jun. 30, 2012
Texas-New Mexico Power Company [Member]
Dec. 31, 2011
Texas-New Mexico Power Company [Member]
Jun. 30, 2011
Texas-New Mexico Power Company [Member]
Dec. 31, 2010
Texas-New Mexico Power Company [Member]
Jun. 30, 2012
Texas-New Mexico Power Company [Member]
Revolving credit facility [Member]
Dec. 31, 2011
Texas-New Mexico Power Company [Member]
Revolving credit facility [Member]
Jul. 27, 2012
Available Borrowing Capacity [Member]
Jul. 27, 2012
Available Borrowing Capacity [Member]
PNM Resources [Member]
Jul. 27, 2012
Available Borrowing Capacity [Member]
Public Service Company of New Mexico [Member]
Jul. 27, 2012
Available Borrowing Capacity [Member]
Texas-New Mexico Power Company [Member]
Jul. 27, 2012
Affiliated Entity [Member]
Intercompany loan agreements [Member]
Texas-New Mexico Power Company [Member]
Short-term Debt [Line Items]                                                      
Line of Credit Facility, Extension Option, Years 1 year                                                    
Short-term Debt, Weighted Average Interest Rate             2.00%               1.75%                        
Line of Credit Facility, Remaining Borrowing Capacity                                             $ 570,500,000 $ 178,800,000 $ 317,000,000 $ 74,700,000  
Cash and cash equivalents 3,184,000 15,091,000 14,023,000 15,404,000             1,168,000 12,307,000 485,000 10,336,000     1,000 1,000 1,000 1,000              
Short-term debt – affiliate                                 8,100,000 700,000                 7,300,000
Line of Credit Facility, Maximum Borrowing Capacity             300,000,000   5,000,000           400,000,000           75,000,000            
Line of Credit Facility, Number of Extension Options 2                                                    
Short-term debt $ 207,000,000 $ 82,700,000     $ 207,000,000 $ 82,700,000 $ 120,600,000 $ 16,700,000 $ 0 $ 0 $ 86,400,000 $ 66,000,000     $ 86,400,000 $ 66,000,000         $ 0 $ 0