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Related Party Transactions (Tables)
9 Months Ended
Sep. 30, 2020
Related Party Transactions [Abstract]  
Schedule of Related Party Transactions
The table below summarizes the nature and amount of related party transactions of PNMR, PNM, TNMP, and NMRD:

Three Months EndedNine Months Ended
September 30,September 30,
2020201920202019
(In thousands)
Services billings:
PNMR to PNM$24,204 $22,853 $70,848 $72,604 
PNMR to TNMP9,645 8,639 28,075 27,082 
PNM to TNMP106 97 295 286 
TNMP to PNMR35 35 106 106 
PNMR to NMRD74 68 199 163 
Renewable energy purchases:
PNM from NMRD3,723 757 7,646 2,331 
Interconnection billings:
PNM to NMRD— — 350 — 
PNM to PNMR— — — — 
Interest billings:
PNMR to PNM— 1,004 2,909 
PNM to PNMR60 75 218 224 
PNMR to TNMP— — 42 
Income tax sharing payments:
PNMR to PNM— — — — 
TNMP to PNMR— — — —