SCHEDULE H, Line 4i - SCHEDULE (MODIFIED CASH BASIS) OF ASSETS (HELD AT END OF YEAR) (Details) - EBP 002	12 Months Ended
Dec. 31, 2025 USD ($) shares
EBP, Schedule of Asset Held for Investment [Line Items]
Plan number	002
Entity tax identification number	75-1848732
Participant loans	$ 1,500,654
Total	$ 79,822,589
Minimum
EBP, Schedule of Asset Held for Investment [Line Items]
Asset held for investment, participant loan, interest rate	3.25%
Maximum
EBP, Schedule of Asset Held for Investment [Line Items]
Asset held for investment, participant loan, interest rate	8.50%
Investment, Identifier [Axis]: Collective Investment Trusts \| Principal Global Investors Trust Company \| Principal Lifetime Hybrid 2015 Fund Z
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	34,239
Current Value	$ 1,172,677
Investment, Identifier [Axis]: Collective Investment Trusts \| Principal Global Investors Trust Company \| Principal Lifetime Hybrid 2020 Fund Z
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	41,147
Current Value	$ 1,595,277
Investment, Identifier [Axis]: Collective Investment Trusts \| Principal Global Investors Trust Company \| Principal Lifetime Hybrid 2025 Fund Z
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	119,093
Current Value	$ 5,131,736
Investment, Identifier [Axis]: Collective Investment Trusts \| Principal Global Investors Trust Company \| Principal Lifetime Hybrid 2030 Fund Z
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	190,443
Current Value	$ 9,025,092
Investment, Identifier [Axis]: Collective Investment Trusts \| Principal Global Investors Trust Company \| Principal Lifetime Hybrid 2035 Fund Z
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	102,343
Current Value	$ 5,322,869
Investment, Identifier [Axis]: Collective Investment Trusts \| Principal Global Investors Trust Company \| Principal Lifetime Hybrid 2040 Fund Z
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	87,426
Current Value	$ 4,960,537
Investment, Identifier [Axis]: Collective Investment Trusts \| Principal Global Investors Trust Company \| Principal Lifetime Hybrid 2045 Fund Z
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	137,200
Current Value	$ 8,354,136
Investment, Identifier [Axis]: Collective Investment Trusts \| Principal Global Investors Trust Company \| Principal Lifetime Hybrid 2050 Fund Z
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	94,844
Current Value	$ 5,994,143
Investment, Identifier [Axis]: Collective Investment Trusts \| Principal Global Investors Trust Company \| Principal Lifetime Hybrid 2055 Fund Z
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	63,699
Current Value	$ 4,109,890
Investment, Identifier [Axis]: Collective Investment Trusts \| Principal Global Investors Trust Company \| Principal Lifetime Hybrid 2060 Fund Z
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	81,595
Current Value	$ 2,534,332
Investment, Identifier [Axis]: Collective Investment Trusts \| Principal Global Investors Trust Company \| Principal Lifetime Hybrid 2065 Fund Z
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	17,484
Current Value	$ 377,660
Investment, Identifier [Axis]: Collective Investment Trusts \| Principal Global Investors Trust Company \| Principal Lifetime Hybrid 2070 Fund Z
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	852
Current Value	$ 13,260
Investment, Identifier [Axis]: Collective Investment Trusts \| Principal Global Investors Trust Company \| Principal Lifetime Hybrid Income Fund Z
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	57,672
Current Value	$ 1,410,082
Investment, Identifier [Axis]: Collective Investment Trusts \| Putnam Investments \| Putnam Large Cap Value Trust II
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	116,224
Current Value	$ 2,071,401
Investment, Identifier [Axis]: Common Stock \| Southside Bancshares, Inc. \| Southside Bancshares, Inc.
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	114,791
Current Value	$ 3,488,490
Investment, Identifier [Axis]: Investment Contract \| Principal Life Insurance Company \| Principal Fixed Income Guaranteed Option
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	$ 975,197
Investment, Identifier [Axis]: Mutual Funds \| Eagle Financial Services, Inc. \| Carillon Eagle Mid Cap Growth R6 Fund
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	13,368
Current Value	$ 962,894
Investment, Identifier [Axis]: Mutual Funds \| Fidelity Investments \| Fidelity 500 Index Fund
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	21,209
Current Value	$ 5,041,813
Investment, Identifier [Axis]: Mutual Funds \| Fidelity Investments \| Fidelity Total Int Index Fund
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	9,656
Current Value	$ 167,239
Investment, Identifier [Axis]: Mutual Funds \| Fidelity Investments \| Fidelity US Bond Index Fund
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	90,724
Current Value	$ 958,049
Investment, Identifier [Axis]: Mutual Funds \| Franklin Templeton Investments \| Franklin Small Cap Growth R6 Fund
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	30,817
Current Value	$ 849,925
Investment, Identifier [Axis]: Mutual Funds \| JP Morgan Funds \| JP Morgan U.S. Research Enhanced Equity R6 Fund
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	49,769
Current Value	$ 2,384,947
Investment, Identifier [Axis]: Mutual Funds \| The American Funds \| American Funds New Perspective R6 Fund
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	15,159
Current Value	$ 1,071,297
Investment, Identifier [Axis]: Mutual Funds \| The American Funds \| American Funds New World R6
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	3,012
Current Value	$ 280,654
Investment, Identifier [Axis]: Mutual Funds \| Vanguard Group \| Vanguard Fed Money Market Investment Fund
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	2,205,667
Current Value	$ 2,205,667
Investment, Identifier [Axis]: Pooled Separate Accounts \| Principal Life Insurance Company \| Principal Core Fixed Income Separate Account Z
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	37,191
Current Value	$ 711,180
Investment, Identifier [Axis]: Pooled Separate Accounts \| Principal Life Insurance Company \| Principal Diversified Income Separate Account Z
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	2,386
Current Value	$ 41,182
Investment, Identifier [Axis]: Pooled Separate Accounts \| Principal Life Insurance Company \| Principal Diversified International Separate Account Z
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	2,235
Current Value	$ 388,086
Investment, Identifier [Axis]: Pooled Separate Accounts \| Principal Life Insurance Company \| Principal Global Real Estate Securities Separate Account Z
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	2,872
Current Value	$ 50,395
Investment, Identifier [Axis]: Pooled Separate Accounts \| Principal Life Insurance Company \| Principal LargeCap Growth I Separate Account Z
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	45,243
Current Value	$ 4,059,339
Investment, Identifier [Axis]: Pooled Separate Accounts \| Principal Life Insurance Company \| Principal MidCap S&P 400 Index Separate Account Z
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	5,912
Current Value	$ 695,051
Investment, Identifier [Axis]: Pooled Separate Accounts \| Principal Life Insurance Company \| Principal MidCap Value I Separate Account Z
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	5,380
Current Value	$ 506,925
Investment, Identifier [Axis]: Pooled Separate Accounts \| Principal Life Insurance Company \| Principal Real Estate Securities Separate Account Z
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	5,895
Current Value	$ 515,124
Investment, Identifier [Axis]: Pooled Separate Accounts \| Principal Life Insurance Company \| Principal SmallCap S&P 600 Index Separate Account Z
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	4,107
Current Value	$ 459,551
Investment, Identifier [Axis]: Pooled Separate Accounts \| Principal Life Insurance Company \| Principal SmallCap Value II Separate Account Z
EBP, Schedule of Asset Held for Investment [Line Items]
Investment, number of shares (in shares) \| shares	7,449
Current Value	$ 435,838

The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b-2

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- Definition

Amount of total assets in schedule of asset held for investment of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Includes, but is not limited to, current value of investment, participant loan, and plan interest in master trust.

+ References

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- Definition

Current value of investment, excluding plan interest in master trust, in schedule of asset held for investment of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Includes, but is not limited to, derivative, investment measured at net asset value per share as practical expedient, and insurance contract.

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- Definition

Amount, after deemed distribution, of participant loan in schedule of asset held for investment of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

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- Definition

Number of shares or units of investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-05(a)(Schedule I))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (3)
-Publisher DOL-EBSA

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (4)
-Publisher DOL-EBSA

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (1)(i)(B)
-Publisher DOL-EBSA

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (2)(i)(B)
-Publisher DOL-EBSA

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 6
-Paragraph d
-Subparagraph (1)(ii)
-Publisher DOL-EBSA

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-02(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

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- Definition

Interest rate on participant loan in schedule of asset held for investment of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

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- Definition

Plan number of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), in three-digit numeric format.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-05(a)(Schedule I))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-05(a)(Schedule II))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (1)
-Publisher DOL-EBSA

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-05(a)(Schedule III))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
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Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
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-Paragraph b
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Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
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Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
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Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
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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/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (1)(i)(D)
-Publisher DOL-EBSA

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-05(a)(Schedule I))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
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Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
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-Publisher DOL-EBSA

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
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