4. Allowance for Loan Losses (Details 2) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Construction/Land Development	$ 68,806	$ 71,620
Farmland	16,735	13,606
Real Estate	188,460	184,546
Multi-Family	9,823	10,298
Commercial Real Estate	155,651	148,906
Home Equity - closed end	10,765	11,606
Home Equity - open end	55,136	54,739
Commercial & Industrial (Non-Real Estate)	35,715	36,912
Consumer (excluding dealer)	10,660	6,633
Total	551,751	538,866
Grade 1 Minimal Risk [Member]
Construction/Land Development	0	0
Farmland	62	63
Real Estate	0	0
Multi-Family	0	0
Commercial Real Estate	0	0
Home Equity - closed end	0	0
Home Equity - open end	115	235
Commercial & Industrial (Non-Real Estate)	223	262
Consumer (excluding dealer)	34	34
Total	434	594
Grade 2 Modest Risk [Member]
Construction/Land Development	1,625	690
Farmland	0	0
Real Estate	1,617	1,512
Multi-Family	0	228
Commercial Real Estate	2,388	3,525
Home Equity - closed end	0	0
Home Equity - open end	1,713	1,598
Commercial & Industrial (Non-Real Estate)	1,971	1,595
Consumer (excluding dealer)	178	490
Total	9,492	9,638
Grade 3 Average Risk [Member]
Construction/Land Development	17,494	12,974
Farmland	4,469	3,153
Real Estate	53,949	53,764
Multi-Family	3,007	4,780
Commercial Real Estate	46,030	45,384
Home Equity - closed end	3,337	3,535
Home Equity - open end	20,073	17,383
Commercial & Industrial (Non-Real Estate)	17,609	13,297
Consumer (excluding dealer)	2,893	2,226
Total	168,861	156,496
Grade 4 Acceptable Risk [Member]
Construction/Land Development	33,461	30,197
Farmland	5,800	4,120
Real Estate	104,600	101,606
Multi-Family	6,645	5,111
Commercial Real Estate	86,775	89,195
Home Equity - closed end	5,490	5,410
Home Equity - open end	29,050	30,888
Commercial & Industrial (Non-Real Estate)	12,725	19,442
Consumer (excluding dealer)	5,597	88
Total	290,143	286,057
Grade 5 Marginally Acceptable [Member]
Construction/Land Development	7,071	9,165
Farmland	3,970	3,793
Real Estate	22,070	19,734
Multi-Family	171	179
Commercial Real Estate	11,301	9,012
Home Equity - closed end	1,924	1,279
Home Equity - open end	3,559	3,945
Commercial & Industrial (Non-Real Estate)	2,664	1,480
Consumer (excluding dealer)	1,893	1,065
Total	54,623	49,652
Grade 6 Watch [Member]
Construction/Land Development	270	3,520
Farmland	493	494
Real Estate	1,154	4,660
Multi-Family	0	0
Commercial Real Estate	2,962	634
Home Equity - closed end	0	1,379
Home Equity - open end	56	176
Commercial & Industrial (Non-Real Estate)	349	207
Consumer (excluding dealer)	65	2,254
Total	5,349	13,324
Grade 7 Substandard [Member]
Construction/Land Development	8,885	15,074
Farmland	1,941	1,983
Real Estate	5,070	3,270
Multi-Family	0	0
Commercial Real Estate	6,195	1,156
Home Equity - closed end	14	3
Home Equity - open end	570	514
Commercial & Industrial (Non-Real Estate)	174	629
Consumer (excluding dealer)	0	476
Total	22,849	23,105
Grade 8 Doubtful [Member]
Construction/Land Development	0	0
Farmland	0	0
Real Estate	0	0
Multi-Family	0	0
Commercial Real Estate	0	0
Home Equity - closed end	0	0
Home Equity - open end	0	0
Commercial & Industrial (Non-Real Estate)	0	0
Consumer (excluding dealer)	0	0
Total	$ 0	$ 0