Annual report pursuant to Section 13 and 15(d)

LOANS HELD FOR INVESTMENT AND ALLOWANCE FOR CREDIT LOSSES - allowance for loan losses by portfolio segment (Details)

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LOANS HELD FOR INVESTMENT AND ALLOWANCE FOR CREDIT LOSSES - allowance for loan losses by portfolio segment (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Activity in the allowance for loan losses by portfolio class      
Beginning Balance   $ 13,905 $ 14,210
Provision for Credit Losses     2,027
Charge-Offs     (4,971)
Recoveries     2,639
Net (Charge-Offs) Recoveries     (2,332)
Ending Balance     13,905
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning Balance $ 23,816 13,905  
Provision for credit losses (2,842) 9,035  
Charge-Offs (4,827) (6,160)  
Recoveries 5,459 3,767  
Net (Charge-Offs) Recoveries 632 (2,393)  
Ending Balance 21,606 23,816 13,905
Adoption of ASC 326 [Member]      
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning Balance   3,269  
Ending Balance     3,269
Commercial, Financial, Agricultural [Member]      
Activity in the allowance for loan losses by portfolio class      
Beginning Balance   1,675 1,434
Provision for Credit Losses     664
Charge-Offs     (768)
Recoveries     345
Net (Charge-Offs) Recoveries     (423)
Ending Balance     1,675
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning Balance 2,204 1,675  
Provision for credit losses (227) 578  
Charge-Offs (239) (789)  
Recoveries 453 252  
Net (Charge-Offs) Recoveries 214 (537)  
Ending Balance 2,191 2,204 1,675
Commercial, Financial, Agricultural [Member] | Adoption of ASC 326 [Member]      
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning Balance   488  
Ending Balance     488
Real Estate - Construction [Member]      
Activity in the allowance for loan losses by portfolio class      
Beginning Balance   370 280
Provision for Credit Losses     371
Charge-Offs     (281)
Recoveries     0
Net (Charge-Offs) Recoveries     (281)
Ending Balance     370
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning Balance 2,479 370  
Provision for credit losses 813 1,757  
Charge-Offs 0 0  
Recoveries 10 50  
Net (Charge-Offs) Recoveries 10 50  
Ending Balance 3,302 2,479 370
Real Estate - Construction [Member] | Adoption of ASC 326 [Member]      
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning Balance   302  
Ending Balance     302
Real Estate - Commercial Mortgage [Member]      
Activity in the allowance for loan losses by portfolio class      
Beginning Balance   3,416 4,181
Provision for Credit Losses     (1,129)
Charge-Offs     (214)
Recoveries     578
Net (Charge-Offs) Recoveries     364
Ending Balance     3,416
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning Balance 7,029 3,416  
Provision for credit losses (1,679) 1,865  
Charge-Offs (405) (28)  
Recoveries 865 318  
Net (Charge-Offs) Recoveries 460 290  
Ending Balance 5,810 7,029 3,416
Real Estate - Commercial Mortgage [Member] | Adoption of ASC 326 [Member]      
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning Balance   1,458  
Ending Balance     1,458
Real Estate - Residential [Member]      
Activity in the allowance for loan losses by portfolio class      
Beginning Balance   3,128 3,400
Provision for Credit Losses     (301)
Charge-Offs     (400)
Recoveries     429
Net (Charge-Offs) Recoveries     29
Ending Balance     3,128
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning Balance 5,440 3,128  
Provision for credit losses (1,956) 940  
Charge-Offs (108) (150)  
Recoveries 753 279  
Net (Charge-Offs) Recoveries 645 129  
Ending Balance 4,129 5,440 3,128
Real Estate - Residential [Member] | Adoption of ASC 326 [Member]      
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning Balance   1,243  
Ending Balance     1,243
Real Estate - Home Equity [Member]      
Activity in the allowance for loan losses by portfolio class      
Beginning Balance   2,224 2,301
Provision for Credit Losses     178
Charge-Offs     (430)
Recoveries     175
Net (Charge-Offs) Recoveries     (255)
Ending Balance     2,224
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning Balance 3,111 2,224  
Provision for credit losses (1,125) 486  
Charge-Offs (103) (151)  
Recoveries 413 178  
Net (Charge-Offs) Recoveries 310 27  
Ending Balance 2,296 3,111 2,224
Real Estate - Home Equity [Member] | Adoption of ASC 326 [Member]      
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning Balance   374  
Ending Balance     374
Consumer [Member]      
Activity in the allowance for loan losses by portfolio class      
Beginning Balance   3,092 2,614
Provision for Credit Losses     2,244
Charge-Offs     (2,878)
Recoveries     1,112
Net (Charge-Offs) Recoveries     (1,766)
Ending Balance     3,092
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning Balance 3,553 3,092  
Provision for credit losses 1,332 3,409  
Charge-Offs (3,972) (5,042)  
Recoveries 2,965 2,690  
Net (Charge-Offs) Recoveries (1,007) (2,352)  
Ending Balance $ 3,878 3,553 3,092
Consumer [Member] | Adoption of ASC 326 [Member]      
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning Balance   $ (596)  
Ending Balance     $ (596)