v3.26.1
Cover
12 Months Ended
Dec. 31, 2025
Document Information [Line Items]  
Document Type 11-K
Entity Registrant Name TXNM ENERGY, INC
Amendment Flag false
CIK 0001108426
EBP 005  
Document Information [Line Items]  
Document Type 11-K
Entity Registrant Name TXNM ENERGY, INC
Amendment Flag false
CIK 0001108426