Loans - Age Analysis of Past Due Loans by Class of Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Age Analysis of Past Due Loans by Class of Loans [Abstract]
Total Past Due	$ 14,280	$ 7,223
Current	879,370	892,562
Total Loans	893,650	899,785
Loans 90 Days Past Due and Still Accruing	0	0
Commercial, financial and agricultural
Age Analysis of Past Due Loans by Class of Loans [Abstract]
Total Past Due	5,350	3,460
Current	250,060	263,880
Total Loans	255,410	267,340
Loans 90 Days Past Due and Still Accruing	0	0
Real estate – construction
Age Analysis of Past Due Loans by Class of Loans [Abstract]
Total Past Due	4,577	164
Current	85,146	87,342
Total Loans	89,723	87,506
Loans 90 Days Past Due and Still Accruing	0	0
Real estate – commercial
Age Analysis of Past Due Loans by Class of Loans [Abstract]
Total Past Due	2,378	1,206
Current	374,145	367,243
Total Loans	376,523	368,449
Loans 90 Days Past Due and Still Accruing	0	0
Real estate – residential
Age Analysis of Past Due Loans by Class of Loans [Abstract]
Total Past Due	1,834	2,133
Current	128,866	130,302
Total Loans	130,700	132,435
Loans 90 Days Past Due and Still Accruing	0	0
Consumer and other
Age Analysis of Past Due Loans by Class of Loans [Abstract]
Total Past Due	141	260
Current	40,643	43,246
Total Loans	40,784	43,506
Loans 90 Days Past Due and Still Accruing	0	0
Lease financing receivable
Age Analysis of Past Due Loans by Class of Loans [Abstract]
Total Past Due	0	0
Current	510	549
Total Loans	510	549
Loans 90 Days Past Due and Still Accruing	0	0
30-59 Days Past Due
Age Analysis of Past Due Loans by Class of Loans [Abstract]
Total Past Due	7,272	1,738
30-59 Days Past Due | Commercial, financial and agricultural
Age Analysis of Past Due Loans by Class of Loans [Abstract]
Total Past Due	1,658	385
30-59 Days Past Due | Real estate – construction
Age Analysis of Past Due Loans by Class of Loans [Abstract]
Total Past Due	4,332	47
30-59 Days Past Due | Real estate – commercial
Age Analysis of Past Due Loans by Class of Loans [Abstract]
Total Past Due	984	435
30-59 Days Past Due | Real estate – residential
Age Analysis of Past Due Loans by Class of Loans [Abstract]
Total Past Due	213	695
30-59 Days Past Due | Consumer and other
Age Analysis of Past Due Loans by Class of Loans [Abstract]
Total Past Due	85	176
30-59 Days Past Due | Lease financing receivable
Age Analysis of Past Due Loans by Class of Loans [Abstract]
Total Past Due	0	0
60-89 Days Past Due
Age Analysis of Past Due Loans by Class of Loans [Abstract]
Total Past Due	644	961
60-89 Days Past Due | Commercial, financial and agricultural
Age Analysis of Past Due Loans by Class of Loans [Abstract]
Total Past Due	62	902
60-89 Days Past Due | Real estate – construction
Age Analysis of Past Due Loans by Class of Loans [Abstract]
Total Past Due	128	0
60-89 Days Past Due | Real estate – commercial
Age Analysis of Past Due Loans by Class of Loans [Abstract]
Total Past Due	0	0
60-89 Days Past Due | Real estate – residential
Age Analysis of Past Due Loans by Class of Loans [Abstract]
Total Past Due	427	31
60-89 Days Past Due | Consumer and other
Age Analysis of Past Due Loans by Class of Loans [Abstract]
Total Past Due	27	28
60-89 Days Past Due | Lease financing receivable
Age Analysis of Past Due Loans by Class of Loans [Abstract]
Total Past Due	0	0
Greater than 90 Days Past Due
Age Analysis of Past Due Loans by Class of Loans [Abstract]
Total Past Due	6,364	4,524
Greater than 90 Days Past Due | Commercial, financial and agricultural
Age Analysis of Past Due Loans by Class of Loans [Abstract]
Total Past Due	3,630	2,173
Greater than 90 Days Past Due | Real estate – construction
Age Analysis of Past Due Loans by Class of Loans [Abstract]
Total Past Due	117	117
Greater than 90 Days Past Due | Real estate – commercial
Age Analysis of Past Due Loans by Class of Loans [Abstract]
Total Past Due	1,394	771
Greater than 90 Days Past Due | Real estate – residential
Age Analysis of Past Due Loans by Class of Loans [Abstract]
Total Past Due	1,194	1,407
Greater than 90 Days Past Due | Consumer and other
Age Analysis of Past Due Loans by Class of Loans [Abstract]
Total Past Due	29	56
Greater than 90 Days Past Due | Lease financing receivable
Age Analysis of Past Due Loans by Class of Loans [Abstract]
Total Past Due	$ 0	$ 0