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Earnings Per Share - Narrative (Details) - shares |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
May 27, 2025 | Jun. 30, 2025 | Jun. 30, 2025
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Common stock in private placement (in shares) |  | 11,600,000 | 11,600,000
TXNM 2024 ATM Program |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |
Initial forward price (in shares) | 1,104,641 | 1,100,000 | 1,100,000

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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