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Financing (Tables)
3 Months Ended
Mar. 31, 2021
Debt Disclosure [Abstract]  
Schedule of Short-term Debt
Short-term debt outstanding consists of:
March 31,December 31,
Short-term Debt20212020
(In thousands)
PNM:
PNM Revolving Credit Facility$— $— 
PNM 2017 New Mexico Credit Facility— 10,000 
— 10,000 
TNMP Revolving Credit Facility43,100 — 
PNMR:
PNMR Revolving Credit Facility114,400 12,000 
     PNMR Development Revolving Credit Facility40,000 10,000 
$197,500 $32,000