LOANS HELD FOR INVESTMENT AND ALLOWANCE FOR CREDIT LOSSES (Loans Held for Investment by Years of Origination) (Details) - USD ($) |
3 Months Ended | 9 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
Dec. 31, 2025 |
|
| Financing Receivable, Recorded Investment [Line Items] | |||||
| Total | $ 2,489,724,000 | $ 2,489,724,000 | $ 2,546,118,000 | ||
| Current Period Gross Writeoffs, Total | 2,136,000 | $ 1,968,000 | 5,684,000 | $ 5,077,000 | |
| Commercial, Financial and Agricultural [Member] | |||||
| Financing Receivable, Recorded Investment [Line Items] | |||||
| 2026 | 34,146,000 | 34,146,000 | 38,002,000 | ||
| 2025 | 28,998,000 | 28,998,000 | 23,692,000 | ||
| 2024 | 16,705,000 | 16,705,000 | 25,742,000 | ||
| 2023 | 15,508,000 | 15,508,000 | 23,376,000 | ||
| 2022 | 14,947,000 | 14,947,000 | 10,942,000 | ||
| Prior | 13,513,000 | 13,513,000 | 8,956,000 | ||
| Revolving Loans | 44,327,000 | 44,327,000 | 49,631,000 | ||
| Total | 168,144,000 | 168,144,000 | 180,341,000 | ||
| Current Period Gross Writeoffs, 2026 | 26,000 | 0 | |||
| Current Period Gross Writeoffs, 2025 | 82,000 | 209,000 | |||
| Current Period Gross Writeoffs, 2024 | 110,000 | 114,000 | |||
| Current Period Gross Writeoffs, 2023 | 279,000 | 344,000 | |||
| Current Period Gross Writeoffs, 2022 | 184,000 | 70,000 | |||
| Current Period Gross Writeoffs, Prior | 12,000 | 1,000 | |||
| Current Period Gross Writeoffs, Revolving | 435,000 | 44,000 | |||
| Current Period Gross Writeoffs, Total | 251,000 | 373,000 | 1,128,000 | 615,000 | 782,000 |
| Commercial, Financial and Agricultural [Member] | Pass [Member] | |||||
| Financing Receivable, Recorded Investment [Line Items] | |||||
| 2026 | 34,032,000 | 34,032,000 | 37,680,000 | ||
| 2025 | 28,937,000 | 28,937,000 | 23,425,000 | ||
| 2024 | 16,563,000 | 16,563,000 | 22,907,000 | ||
| 2023 | 13,119,000 | 13,119,000 | 23,068,000 | ||
| 2022 | 13,790,000 | 13,790,000 | 10,922,000 | ||
| Prior | 13,510,000 | 13,510,000 | 8,740,000 | ||
| Revolving Loans | 43,485,000 | 43,485,000 | 48,354,000 | ||
| Total | 163,436,000 | 163,436,000 | 175,096,000 | ||
| Commercial, Financial and Agricultural [Member] | Special Mention [Member] | |||||
| Financing Receivable, Recorded Investment [Line Items] | |||||
| 2026 | 0 | 0 | 322,000 | ||
| 2025 | 61,000 | 61,000 | 121,000 | ||
| 2024 | 37,000 | 37,000 | 2,740,000 | ||
| 2023 | 2,340,000 | 2,340,000 | 63,000 | ||
| 2022 | 1,090,000 | 1,090,000 | 4,000 | ||
| Prior | 0 | 0 | 180,000 | ||
| Revolving Loans | 768,000 | 768,000 | 163,000 | ||
| Total | 4,296,000 | 4,296,000 | 3,593,000 | ||
| Commercial, Financial and Agricultural [Member] | Substandard [Member] | |||||
| Financing Receivable, Recorded Investment [Line Items] | |||||
| 2026 | 114,000 | 114,000 | 0 | ||
| 2025 | 0 | 0 | 146,000 | ||
| 2024 | 105,000 | 105,000 | 95,000 | ||
| 2023 | 49,000 | 49,000 | 245,000 | ||
| 2022 | 67,000 | 67,000 | 16,000 | ||
| Prior | 3,000 | 3,000 | 36,000 | ||
| Revolving Loans | 74,000 | 74,000 | 1,114,000 | ||
| Total | 412,000 | 412,000 | 1,652,000 | ||
| Real Estate - Construction [Member] | |||||
| Financing Receivable, Recorded Investment [Line Items] | |||||
| 2026 | 56,034,000 | 56,034,000 | 76,850,000 | ||
| 2025 | 70,866,000 | 70,866,000 | 39,024,000 | ||
| 2024 | 3,067,000 | 3,067,000 | 4,388,000 | ||
| 2023 | 2,591,000 | 2,591,000 | 17,123,000 | ||
| 2022 | 10,179,000 | 10,179,000 | 53,000 | ||
| Prior | 53,000 | 53,000 | 187,000 | ||
| Revolving Loans | 6,545,000 | 6,545,000 | 9,295,000 | ||
| Total | 149,335,000 | 149,335,000 | 146,920,000 | ||
| Current Period Gross Writeoffs, Total | 0 | 0 | 0 | 0 | |
| Real Estate - Construction [Member] | Pass [Member] | |||||
| Financing Receivable, Recorded Investment [Line Items] | |||||
| 2026 | 56,034,000 | 56,034,000 | 76,850,000 | ||
| 2025 | 70,866,000 | 70,866,000 | 39,024,000 | ||
| 2024 | 2,433,000 | 2,433,000 | 3,298,000 | ||
| 2023 | 2,212,000 | 2,212,000 | 14,996,000 | ||
| 2022 | 9,694,000 | 9,694,000 | 53,000 | ||
| Prior | 53,000 | 53,000 | 187,000 | ||
| Revolving Loans | 6,545,000 | 6,545,000 | 9,295,000 | ||
| Total | 147,837,000 | 147,837,000 | 143,703,000 | ||
| Real Estate - Construction [Member] | Special Mention [Member] | |||||
| Financing Receivable, Recorded Investment [Line Items] | |||||
| 2026 | 0 | 0 | 0 | ||
| 2025 | 0 | 0 | 0 | ||
| 2024 | 0 | 0 | 372,000 | ||
| 2023 | 0 | 0 | 2,127,000 | ||
| 2022 | 485,000 | 485,000 | 0 | ||
| Prior | 0 | 0 | 0 | ||
| Revolving Loans | 0 | 0 | 0 | ||
| Total | 485,000 | 485,000 | 2,499,000 | ||
| Real Estate - Construction [Member] | Substandard [Member] | |||||
| Financing Receivable, Recorded Investment [Line Items] | |||||
| 2026 | 0 | 0 | 0 | ||
| 2025 | 0 | 0 | 0 | ||
| 2024 | 634,000 | 634,000 | 718,000 | ||
| 2023 | 379,000 | 379,000 | 0 | ||
| 2022 | 0 | 0 | 0 | ||
| Prior | 0 | 0 | 0 | ||
| Revolving Loans | 0 | 0 | 0 | ||
| Total | 1,013,000 | 1,013,000 | 718,000 | ||
| Real Estate - Commercial Mortgage [Member] | |||||
| Financing Receivable, Recorded Investment [Line Items] | |||||
| 2026 | 77,549,000 | 77,549,000 | 104,303,000 | ||
| 2025 | 90,365,000 | 90,365,000 | 82,227,000 | ||
| 2024 | 68,396,000 | 68,396,000 | 107,085,000 | ||
| 2023 | 87,102,000 | 87,102,000 | 195,924,000 | ||
| 2022 | 176,236,000 | 176,236,000 | 97,539,000 | ||
| Prior | 214,536,000 | 214,536,000 | 158,228,000 | ||
| Revolving Loans | 22,196,000 | 22,196,000 | 23,425,000 | ||
| Total | 736,380,000 | 736,380,000 | 768,731,000 | ||
| Current Period Gross Writeoffs, 2026 | 0 | ||||
| Current Period Gross Writeoffs, 2025 | 0 | ||||
| Current Period Gross Writeoffs, 2024 | 0 | ||||
| Current Period Gross Writeoffs, 2023 | 0 | ||||
| Current Period Gross Writeoffs, 2022 | 0 | ||||
| Current Period Gross Writeoffs, Prior | 4,000 | ||||
| Current Period Gross Writeoffs, Revolving | 0 | ||||
| Current Period Gross Writeoffs, Total | 0 | 0 | 0 | 0 | 4,000 |
| Real Estate - Commercial Mortgage [Member] | Pass [Member] | |||||
| Financing Receivable, Recorded Investment [Line Items] | |||||
| 2026 | 73,556,000 | 73,556,000 | 93,723,000 | ||
| 2025 | 81,383,000 | 81,383,000 | 76,348,000 | ||
| 2024 | 63,168,000 | 63,168,000 | 101,262,000 | ||
| 2023 | 83,575,000 | 83,575,000 | 174,959,000 | ||
| 2022 | 146,789,000 | 146,789,000 | 92,388,000 | ||
| Prior | 203,907,000 | 203,907,000 | 152,307,000 | ||
| Revolving Loans | 20,802,000 | 20,802,000 | 22,555,000 | ||
| Total | 673,180,000 | 673,180,000 | 713,542,000 | ||
| Real Estate - Commercial Mortgage [Member] | Special Mention [Member] | |||||
| Financing Receivable, Recorded Investment [Line Items] | |||||
| 2026 | 3,993,000 | 3,993,000 | 9,830,000 | ||
| 2025 | 4,780,000 | 4,780,000 | 4,477,000 | ||
| 2024 | 267,000 | 267,000 | 5,725,000 | ||
| 2023 | 3,431,000 | 3,431,000 | 20,547,000 | ||
| 2022 | 27,590,000 | 27,590,000 | 3,922,000 | ||
| Prior | 8,159,000 | 8,159,000 | 4,074,000 | ||
| Revolving Loans | 1,250,000 | 1,250,000 | 720,000 | ||
| Total | 49,470,000 | 49,470,000 | 49,295,000 | ||
| Real Estate - Commercial Mortgage [Member] | Substandard [Member] | |||||
| Financing Receivable, Recorded Investment [Line Items] | |||||
| 2026 | 0 | 0 | 750,000 | ||
| 2025 | 4,202,000 | 4,202,000 | 1,402,000 | ||
| 2024 | 3,559,000 | 3,559,000 | 98,000 | ||
| 2023 | 96,000 | 96,000 | 418,000 | ||
| 2022 | 1,857,000 | 1,857,000 | 1,229,000 | ||
| Prior | 2,470,000 | 2,470,000 | 1,847,000 | ||
| Revolving Loans | 144,000 | 144,000 | 150,000 | ||
| Total | 12,328,000 | 12,328,000 | 5,894,000 | ||
| Real Estate - Commercial Mortgage [Member] | Doubtful [Member] | |||||
| Financing Receivable, Recorded Investment [Line Items] | |||||
| 2026 | 0 | 0 | |||
| 2025 | 0 | 0 | |||
| 2024 | 1,402,000 | 1,402,000 | |||
| 2023 | 0 | 0 | |||
| 2022 | 0 | 0 | |||
| Prior | 0 | 0 | |||
| Revolving Loans | 0 | 0 | |||
| Total | 1,402,000 | 1,402,000 | |||
| Real Estate - Residential [Member] | |||||
| Financing Receivable, Recorded Investment [Line Items] | |||||
| 2026 | 111,658,000 | 111,658,000 | 142,278,000 | ||
| 2025 | 115,477,000 | 115,477,000 | 131,453,000 | ||
| 2024 | 106,032,000 | 106,032,000 | 270,273,000 | ||
| 2023 | 232,925,000 | 232,925,000 | 317,719,000 | ||
| 2022 | 293,729,000 | 293,729,000 | 62,214,000 | ||
| Prior | 134,042,000 | 134,042,000 | 90,693,000 | ||
| Revolving Loans | 10,575,000 | 10,575,000 | 11,060,000 | ||
| Total | 1,004,438,000 | 1,004,438,000 | 1,025,690,000 | ||
| Current Period Gross Writeoffs, 2026 | 0 | 0 | |||
| Current Period Gross Writeoffs, 2025 | 0 | 27,000 | |||
| Current Period Gross Writeoffs, 2024 | 0 | 59,000 | |||
| Current Period Gross Writeoffs, 2023 | 0 | 32,000 | |||
| Current Period Gross Writeoffs, 2022 | 0 | 0 | |||
| Current Period Gross Writeoffs, Prior | 17,000 | 18,000 | |||
| Current Period Gross Writeoffs, Revolving | 30,000 | 0 | |||
| Current Period Gross Writeoffs, Total | 9,000 | 12,000 | 47,000 | 69,000 | 136,000 |
| Real Estate - Residential [Member] | Pass [Member] | |||||
| Financing Receivable, Recorded Investment [Line Items] | |||||
| 2026 | 110,864,000 | 110,864,000 | 142,278,000 | ||
| 2025 | 115,191,000 | 115,191,000 | 130,895,000 | ||
| 2024 | 105,477,000 | 105,477,000 | 269,844,000 | ||
| 2023 | 231,979,000 | 231,979,000 | 316,402,000 | ||
| 2022 | 292,824,000 | 292,824,000 | 59,950,000 | ||
| Prior | 129,618,000 | 129,618,000 | 87,545,000 | ||
| Revolving Loans | 10,575,000 | 10,575,000 | 10,521,000 | ||
| Total | 996,528,000 | 996,528,000 | 1,017,435,000 | ||
| Real Estate - Residential [Member] | Special Mention [Member] | |||||
| Financing Receivable, Recorded Investment [Line Items] | |||||
| 2026 | 337,000 | 337,000 | 0 | ||
| 2025 | 0 | 0 | 0 | ||
| 2024 | 0 | 0 | 0 | ||
| 2023 | 0 | 0 | 116,000 | ||
| 2022 | 113,000 | 113,000 | 954,000 | ||
| Prior | 1,172,000 | 1,172,000 | 807,000 | ||
| Revolving Loans | 0 | 0 | 378,000 | ||
| Total | 1,622,000 | 1,622,000 | 2,255,000 | ||
| Real Estate - Residential [Member] | Substandard [Member] | |||||
| Financing Receivable, Recorded Investment [Line Items] | |||||
| 2026 | 457,000 | 457,000 | 0 | ||
| 2025 | 286,000 | 286,000 | 558,000 | ||
| 2024 | 555,000 | 555,000 | 429,000 | ||
| 2023 | 946,000 | 946,000 | 1,201,000 | ||
| 2022 | 792,000 | 792,000 | 1,310,000 | ||
| Prior | 3,252,000 | 3,252,000 | 2,341,000 | ||
| Revolving Loans | 0 | 0 | 161,000 | ||
| Total | 6,288,000 | 6,288,000 | 6,000,000 | ||
| Real Estate - Home Equity [Member] | |||||
| Financing Receivable, Recorded Investment [Line Items] | |||||
| 2026 | 600,000 | 600,000 | 391,000 | ||
| 2025 | 269,000 | 269,000 | 9,000 | ||
| 2024 | 0 | 0 | 411,000 | ||
| 2023 | 219,000 | 219,000 | 19,000 | ||
| 2022 | 16,000 | 16,000 | 106,000 | ||
| Prior | 406,000 | 406,000 | 587,000 | ||
| Revolving Loans | 244,610,000 | 244,610,000 | 239,374,000 | ||
| Total | 246,120,000 | 246,120,000 | 240,897,000 | ||
| Current Period Gross Writeoffs, 2026 | 0 | 0 | |||
| Current Period Gross Writeoffs, 2025 | 0 | 0 | |||
| Current Period Gross Writeoffs, 2024 | 0 | 0 | |||
| Current Period Gross Writeoffs, 2023 | 0 | 0 | |||
| Current Period Gross Writeoffs, 2022 | 0 | 0 | |||
| Current Period Gross Writeoffs, Prior | (33,000) | 9,000 | |||
| Current Period Gross Writeoffs, Revolving | 39,000 | 35,000 | |||
| Current Period Gross Writeoffs, Total | (7,000) | 10,000 | 6,000 | 34,000 | 44,000 |
| Real Estate - Home Equity [Member] | Performing Financial Instruments [Member] | |||||
| Financing Receivable, Recorded Investment [Line Items] | |||||
| 2026 | 600,000 | 600,000 | 391,000 | ||
| 2025 | 269,000 | 269,000 | 9,000 | ||
| 2024 | 0 | 0 | 411,000 | ||
| 2023 | 219,000 | 219,000 | 19,000 | ||
| 2022 | 16,000 | 16,000 | 106,000 | ||
| Prior | 406,000 | 406,000 | 587,000 | ||
| Revolving Loans | 244,418,000 | 244,418,000 | 237,678,000 | ||
| Total | 245,928,000 | 245,928,000 | 239,201,000 | ||
| Real Estate - Home Equity [Member] | Nonperforming Financial Instruments [Member] | |||||
| Financing Receivable, Recorded Investment [Line Items] | |||||
| 2026 | 0 | 0 | 0 | ||
| 2025 | 0 | 0 | 0 | ||
| 2024 | 0 | 0 | 0 | ||
| 2023 | 0 | 0 | 0 | ||
| 2022 | 0 | 0 | 0 | ||
| Prior | 0 | 0 | 0 | ||
| Revolving Loans | 192,000 | 192,000 | 1,696,000 | ||
| Total | 192,000 | 192,000 | 1,696,000 | ||
| Consumer [Member] | |||||
| Financing Receivable, Recorded Investment [Line Items] | |||||
| 2026 | 61,131,000 | 61,131,000 | 63,629,000 | ||
| 2025 | 46,690,000 | 46,690,000 | 22,057,000 | ||
| 2024 | 15,060,000 | 15,060,000 | 28,068,000 | ||
| 2023 | 17,731,000 | 17,731,000 | 31,679,000 | ||
| 2022 | 18,679,000 | 18,679,000 | 21,596,000 | ||
| Prior | 12,430,000 | 12,430,000 | 5,195,000 | ||
| Revolving Loans | 13,586,000 | 13,586,000 | 11,315,000 | ||
| Total | 185,307,000 | 185,307,000 | 183,539,000 | ||
| Current Period Gross Writeoffs, 2026 | 2,364,000 | 2,789,000 | |||
| Current Period Gross Writeoffs, 2025 | 613,000 | 376,000 | |||
| Current Period Gross Writeoffs, 2024 | 200,000 | 1,003,000 | |||
| Current Period Gross Writeoffs, 2023 | 454,000 | 1,036,000 | |||
| Current Period Gross Writeoffs, 2022 | 487,000 | 454,000 | |||
| Current Period Gross Writeoffs, Prior | 257,000 | 144,000 | |||
| Current Period Gross Writeoffs, Revolving | 128,000 | 152,000 | |||
| Current Period Gross Writeoffs, Total | 1,883,000 | $ 1,573,000 | 4,503,000 | $ 4,359,000 | 5,954,000 |
| Consumer [Member] | Performing Financial Instruments [Member] | |||||
| Financing Receivable, Recorded Investment [Line Items] | |||||
| 2026 | 61,018,000 | 61,018,000 | 63,443,000 | ||
| 2025 | 46,514,000 | 46,514,000 | 21,866,000 | ||
| 2024 | 14,991,000 | 14,991,000 | 27,919,000 | ||
| 2023 | 17,655,000 | 17,655,000 | 31,464,000 | ||
| 2022 | 18,508,000 | 18,508,000 | 21,524,000 | ||
| Prior | 12,339,000 | 12,339,000 | 5,164,000 | ||
| Revolving Loans | 13,586,000 | 13,586,000 | 11,315,000 | ||
| Total | 184,611,000 | 184,611,000 | 182,695,000 | ||
| Consumer [Member] | Nonperforming Financial Instruments [Member] | |||||
| Financing Receivable, Recorded Investment [Line Items] | |||||
| 2026 | 113,000 | 113,000 | 186,000 | ||
| 2025 | 176,000 | 176,000 | 191,000 | ||
| 2024 | 69,000 | 69,000 | 149,000 | ||
| 2023 | 76,000 | 76,000 | 215,000 | ||
| 2022 | 171,000 | 171,000 | 72,000 | ||
| Prior | 91,000 | 91,000 | 31,000 | ||
| Revolving Loans | 0 | 0 | 0 | ||
| Total | $ 696,000 | $ 696,000 | $ 844,000 | ||