Allowance for Loan Losses - Segregated by Class of Loan (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 12,871	$ 10,289	$ 12,127	$ 6,863
Charge-offs	(743)	(559)	(837)	(1,456)
Recoveries	599	184	937	351
Provision	150	1,106	650	5,262
Ending balance	12,877	11,020	12,877	11,020
Period end amount allocated to
Individually evaluated for impairment	993		993		$ 1,925
Collectively evaluated for impairment	11,750		11,750		10,117
Purchase credit impaired	993		993		1,925
Loans
Individually evaluated for impairment	13,379		13,379		27,114
Collectively evaluated for impairment	1,295,479		1,295,479		1,032,142
Purchase credit impaired	14,381		14,381		27,361
Loans	1,309,860		1,309,860		1,059,503
Purchase credit impaired
Period end amount allocated to
Purchase credit impaired	134		134		85
Loans
Purchase credit impaired	1,002		1,002		247
Residential real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	2,273	1,631	2,278	980
Charge-offs	0	(144)	0	(159)
Recoveries	143	120	254	130
Provision	(126)	317	(242)	973
Ending balance	2,290	1,924	2,290	1,924
Period end amount allocated to
Individually evaluated for impairment	113		113		226
Collectively evaluated for impairment	2,169		2,169		2,048
Purchase credit impaired	113		113		226
Loans
Individually evaluated for impairment	1,972		1,972		2,352
Collectively evaluated for impairment	216,244		216,244		180,658
Purchase credit impaired	1,980		1,980		2,363
Loans	218,224		218,224		183,021
Residential real estate | Purchase credit impaired
Period end amount allocated to
Purchase credit impaired	8		8		4
Loans
Purchase credit impaired	8		8		11
Commercial, financial & agricultural
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	1,773	1,913	1,713	1,657
Charge-offs	(209)	(153)	(225)	(221)
Recoveries	66	1	83	21
Provision	203	346	262	650
Ending balance	1,833	2,107	1,833	2,107
Period end amount allocated to
Individually evaluated for impairment	0		0		263
Collectively evaluated for impairment	1,829		1,829		1,450
Purchase credit impaired	0		0		263
Loans
Individually evaluated for impairment	80		80		350
Collectively evaluated for impairment	166,101		166,101		212,984
Purchase credit impaired	127		127		396
Loans	166,228		166,228		213,380
Commercial, financial & agricultural | Purchase credit impaired
Period end amount allocated to
Purchase credit impaired	4		4		0
Loans
Purchase credit impaired	47		47		46
Consumer and other
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	423	275	243	103
Charge-offs	(3)	(36)	(44)	(846)
Recoveries	13	54	44	140
Provision	(28)	117	162	1,013
Ending balance	405	410	405	410
Period end amount allocated to
Individually evaluated for impairment	0		0		0
Collectively evaluated for impairment	309		309		162
Purchase credit impaired	0		0		0
Loans
Individually evaluated for impairment	0		0		0
Collectively evaluated for impairment	19,688		19,688		21,522
Purchase credit impaired	96		96		96
Loans	19,784		19,784		21,618
Consumer and other | Purchase credit impaired
Period end amount allocated to
Purchase credit impaired	96		96		81
Loans
Purchase credit impaired	96		96		96
Construction, land and land development
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	1,125	759	1,013	215
Charge-offs	0	0	0	(4)
Recoveries	363	6	448	31
Provision	(439)	199	(412)	722
Ending balance	1,049	964	1,049	964
Period end amount allocated to
Individually evaluated for impairment	0		0		0
Collectively evaluated for impairment	1,049		1,049		1,013
Purchase credit impaired	0		0		0
Loans
Individually evaluated for impairment	61		61		6,982
Collectively evaluated for impairment	152,930		152,930		114,017
Purchase credit impaired	61		61		7,076
Loans	152,991		152,991		121,093
Construction, land and land development | Purchase credit impaired
Period end amount allocated to
Purchase credit impaired	0		0		0
Loans
Purchase credit impaired	0		0		94
Other commercial real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	7,277	5,711	6,880	3,908
Charge-offs	(531)	(226)	(568)	(226)
Recoveries	14	3	108	29
Provision	540	127	880	1,904
Ending balance	7,300	$ 5,615	7,300	$ 5,615
Period end amount allocated to
Individually evaluated for impairment	880		880		1,436
Collectively evaluated for impairment	6,394		6,394		5,444
Purchase credit impaired	880		880		1,436
Loans
Individually evaluated for impairment	11,266		11,266		17,430
Collectively evaluated for impairment	740,516		740,516		502,961
Purchase credit impaired	12,117		12,117		17,430
Loans	752,633		752,633		520,391
Other commercial real estate | Purchase credit impaired
Period end amount allocated to
Purchase credit impaired	26		26		0
Loans
Purchase credit impaired	$ 851		$ 851		$ 0