XML 139 R129.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Income Taxes - Schedule of Deferred Income Tax Components (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Taxes [Line Items]      
Net change in deferred income tax liability per above table $ 25,339    
Change in tax effects of income tax related regulatory assets and liabilities (10,332)    
Amortization of excess deferred income tax (37,799)    
Tax effect of mark-to-market adjustments (2,261)    
Tax effect of excess pension liability (908)    
Adjustment for uncertain income tax positions 499    
Reclassification of unrecognized tax benefits (499)    
Amortization of state net operating loss recovered in prior years 1,367    
Refundable alternative minimum tax credit carryforward reclassified to receivable (576)    
Other (215)    
Deferred income taxes (benefits) (25,385) $ 8,019 $ 130,528
Public Service Company of New Mexico      
Income Taxes [Line Items]      
Net change in deferred income tax liability per above table 19,223    
Change in tax effects of income tax related regulatory assets and liabilities (7,861)    
Amortization of excess deferred income tax (28,923)    
Tax effect of mark-to-market adjustments (2,962)    
Tax effect of excess pension liability (908)    
Adjustment for uncertain income tax positions 488    
Reclassification of unrecognized tax benefits (488)    
Amortization of state net operating loss recovered in prior years 1,367    
Other (81)    
Deferred income taxes (benefits) (20,145) 3,334 82,549
Texas-New Mexico Power Company      
Income Taxes [Line Items]      
Net change in deferred income tax liability per above table 3,913    
Change in tax effects of income tax related regulatory assets and liabilities (2,471)    
Amortization of excess deferred income tax (8,876)    
Other (216)    
Deferred income taxes (benefits) $ (7,650) $ 1,780 $ 27,275