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Loans and Allowance for Loan Losses - Allowance for Loan Losses (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Beginning balance				$ 5,055
Provision		$ 883	$ 789	1,998	$ 2,149
Ending balance		5,585		5,585		$ 5,055
Loans		555,338		555,338		525,870
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]
Loans		27,348		27,348		41,340
Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member]
Loans		109,336		109,336		110,756
Real Estate [Member] | Secured By Multi family Residential Properties [Member]
Loans		46,843		46,843		23,009
Real Estate [Member] | Secured By Non-farm Non residential Properties [Member]
Loans		164,941		164,941		156,162
Real Estate [Member] | Other Real Estate Loans [Member]
Loans		842		842		1,308
Commercial and Industrial Loans [Member]
Loans	[1]	90,470		90,470		85,779
Consumer Portfolio Segment [Member] | Consumer Loans [Member]
Loans		37,477		37,477		38,583
Consumer Portfolio Segment [Member] | Branch Retail [Member]
Loans		30,008		30,008		28,324
Consumer Portfolio Segment [Member] | Indirect Sales [Member]
Loans		48,073		48,073		40,609
FUSB [Member]
Beginning balance				2,735	2,447	2,447
Charge-offs				(79)		(16)
Recoveries				58		89
Provision				635		215
Ending balance		3,349		3,349		2,735
Individually evaluated for impairment		418		418		166
Collectively evaluated for impairment		2,931		2,931		2,569
Individually evaluated for impairment		5,255		5,255		831
Collectively evaluated for impairment		436,414		436,414		416,168
Loans		441,849		441,849		417,496
FUSB [Member] | Financial Asset Acquired With Credit Deterioration [Member]
Loans		180		180		497
FUSB [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]
Beginning balance				240	203	203
Provision				(78)		37
Ending balance		162		162		240
Individually evaluated for impairment						28
Collectively evaluated for impairment		162		162		212
Individually evaluated for impairment						153
Collectively evaluated for impairment		27,348		27,348		41,114
Loans		27,348		27,348		41,340
FUSB [Member] | Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member]
Beginning balance				322	238	238
Charge-offs				(47)		(9)
Recoveries				22		51
Provision				139		42
Ending balance		436		436		322
Individually evaluated for impairment		15		15		50
Collectively evaluated for impairment		421		421		272
Individually evaluated for impairment		702		702		57
Collectively evaluated for impairment		102,387		102,387		102,490
Loans		103,269		103,269		102,971
FUSB [Member] | Real Estate [Member] | Secured By Multi family Residential Properties [Member]
Beginning balance				128	116	116
Provision				233		12
Ending balance		361		361		128
Collectively evaluated for impairment		361		361		128
Collectively evaluated for impairment		46,843		46,843		23,009
Loans		46,843		46,843		23,009
FUSB [Member] | Real Estate [Member] | Secured By Non-farm Non residential Properties [Member]
Beginning balance				831	777	777
Recoveries						4
Provision				72		50
Ending balance		903		903		831
Individually evaluated for impairment						1
Collectively evaluated for impairment		903		903		830
Individually evaluated for impairment		496		496		511
Collectively evaluated for impairment		164,445		164,445		155,651
Loans		164,941		164,941		156,162
FUSB [Member] | Real Estate [Member] | Other Real Estate Loans [Member]
Beginning balance				1	2	2
Provision						(1)
Ending balance		1		1		1
Collectively evaluated for impairment		1		1		1
Collectively evaluated for impairment		842		842		1,308
Loans		842		842		1,308
FUSB [Member] | Real Estate [Member] | Financial Asset Acquired With Credit Deterioration [Member] | Construction, Land Development and Other Land Loans [Member]
Loans						73
FUSB [Member] | Real Estate [Member] | Financial Asset Acquired With Credit Deterioration [Member] | Secured by 1-4 Family Residential Properties [Member]
Loans		180		180		424
FUSB [Member] | Commercial and Industrial Loans [Member]
Beginning balance				1,138	1,049	1,049
Charge-offs						(3)
Recoveries				3		11
Provision				259		81
Ending balance		1,400		1,400		1,138
Individually evaluated for impairment		394		394		67
Collectively evaluated for impairment		1,006		1,006		1,071
Individually evaluated for impairment		4,025		4,025		67
Collectively evaluated for impairment		86,445		86,445		85,712
Loans	[1]	90,470		90,470		85,779
FUSB [Member] | Consumer Portfolio Segment [Member]
Loans		8,136		8,136		6,927
FUSB [Member] | Consumer Portfolio Segment [Member] | Consumer Loans [Member]
Beginning balance				75	62	62
Charge-offs				(32)		(4)
Recoveries				33		23
Provision				10		(6)
Ending balance		86		86		75
Individually evaluated for impairment		9		9		20
Collectively evaluated for impairment		77		77		55
Individually evaluated for impairment		32		32		43
Collectively evaluated for impairment		8,104		8,104		6,884
Loans		8,136		8,136		6,927
ALC [Member]
Beginning balance				2,320	2,327	2,327
Charge-offs				(2,023)		(3,101)
Recoveries				576		687
Provision				1,363		2,407
Ending balance		2,236		2,236		2,320
Collectively evaluated for impairment		2,236		2,236		2,320
Individually evaluated for impairment		137		137		211
Collectively evaluated for impairment		113,352		113,352		108,163
Loans		113,489		113,489		108,374
ALC [Member] | Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member]
Beginning balance				24	52	52
Charge-offs				(34)		(92)
Recoveries				6		23
Provision				29		41
Ending balance		25		25		24
Collectively evaluated for impairment		25		25		24
Individually evaluated for impairment		137		137		211
Collectively evaluated for impairment		5,930		5,930		7,574
Loans		6,067		6,067		7,785
ALC [Member] | Consumer Portfolio Segment [Member] | Consumer Loans [Member]
Beginning balance				1,724	1,653	1,653
Charge-offs				(1,501)		(2,478)
Recoveries				470		545
Provision				862		2,004
Ending balance		1,555		1,555		1,724
Collectively evaluated for impairment		1,555		1,555		1,724
Collectively evaluated for impairment		29,341		29,341		31,656
Loans		29,341		29,341		31,656
ALC [Member] | Consumer Portfolio Segment [Member] | Branch Retail [Member]
Beginning balance				427	393	393
Charge-offs				(294)		(415)
Recoveries				94		113
Provision				204		336
Ending balance		431		431		427
Collectively evaluated for impairment		431		431		427
Collectively evaluated for impairment		30,008		30,008		28,324
Loans		30,008		30,008		28,324
ALC [Member] | Consumer Portfolio Segment [Member] | Indirect Sales [Member]
Beginning balance				145	229	229
Charge-offs				(194)		(116)
Recoveries				6		6
Provision				268		26
Ending balance		225		225		145
Collectively evaluated for impairment		225		225		145
Collectively evaluated for impairment		48,073		48,073		40,609
Loans		48,073		48,073		40,609
FUSB and ALC [Member]
Beginning balance				5,055	4,774	4,774
Charge-offs				(2,102)		(3,117)
Recoveries				634		776
Provision				1,998		2,622
Ending balance		5,585		5,585		5,055
Individually evaluated for impairment		418		418
Collectively evaluated for impairment		5,167		5,167		4,889
Individually evaluated for impairment		5,392		5,392		1,042
Collectively evaluated for impairment		549,766		549,766		524,331
Loans		555,338		555,338		525,870
FUSB and ALC [Member] | Financial Asset Acquired With Credit Deterioration [Member]
Loans		180		180		497
FUSB and ALC [Member] | FUSB [Member]
Individually evaluated for impairment						166
FUSB and ALC [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]
Beginning balance				240	203	203
Provision				(78)		37
Ending balance		162		162		240
Collectively evaluated for impairment		162		162		212
Individually evaluated for impairment						153
Collectively evaluated for impairment		27,348		27,348		41,114
Loans		27,348		27,348		41,340
FUSB and ALC [Member] | Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member]
Beginning balance				346	290	290
Charge-offs				(81)		(101)
Recoveries				28		74
Provision				168		83
Ending balance		461		461		346
Individually evaluated for impairment		15		15
Collectively evaluated for impairment		446		446		296
Individually evaluated for impairment		839		839		268
Collectively evaluated for impairment		108,317		108,317		110,064
Loans		109,336		109,336		110,756
FUSB and ALC [Member] | Real Estate [Member] | Secured By Multi family Residential Properties [Member]
Beginning balance				128	116	116
Provision				233		12
Ending balance		361		361		128
Collectively evaluated for impairment		361		361		128
Collectively evaluated for impairment		46,843		46,843		23,009
Loans		46,843		46,843		23,009
FUSB and ALC [Member] | Real Estate [Member] | Secured By Non-farm Non residential Properties [Member]
Beginning balance				831	777	777
Recoveries						4
Provision				72		50
Ending balance		903		903		831
Collectively evaluated for impairment		903		903		830
Individually evaluated for impairment		496		496		511
Collectively evaluated for impairment		164,445		164,445		155,651
Loans		164,941		164,941		156,162
FUSB and ALC [Member] | Real Estate [Member] | Other Real Estate Loans [Member]
Beginning balance				1	2	2
Provision						(1)
Ending balance		1		1		1
Collectively evaluated for impairment		1		1		1
Collectively evaluated for impairment		842		842		1,308
Loans		842		842		1,308
FUSB and ALC [Member] | Real Estate [Member] | Financial Asset Acquired With Credit Deterioration [Member] | Construction, Land Development and Other Land Loans [Member]
Loans						73
FUSB and ALC [Member] | Real Estate [Member] | Financial Asset Acquired With Credit Deterioration [Member] | Secured by 1-4 Family Residential Properties [Member]
Loans		180		180		424
FUSB and ALC [Member] | Real Estate [Member] | FUSB [Member] | Construction, Land Development and Other Land Loans [Member]
Individually evaluated for impairment						28
FUSB and ALC [Member] | Real Estate [Member] | FUSB [Member] | Secured by 1-4 Family Residential Properties [Member]
Individually evaluated for impairment						50
FUSB and ALC [Member] | Real Estate [Member] | FUSB [Member] | Secured By Non-farm Non residential Properties [Member]
Individually evaluated for impairment						1
FUSB and ALC [Member] | Commercial and Industrial Loans [Member]
Beginning balance				1,138	1,049	1,049
Charge-offs						(3)
Recoveries				3		11
Provision				259		81
Ending balance		1,400		1,400		1,138
Individually evaluated for impairment		394		394
Collectively evaluated for impairment		1,006		1,006		1,071
Individually evaluated for impairment		4,025		4,025		67
Collectively evaluated for impairment		86,445		86,445		85,712
Loans		90,470		90,470		85,779
FUSB and ALC [Member] | Commercial and Industrial Loans [Member] | FUSB [Member]
Individually evaluated for impairment						67
FUSB and ALC [Member] | Consumer Portfolio Segment [Member] | Consumer Loans [Member]
Beginning balance				1,799	1,715	1,715
Charge-offs				(1,533)		(2,482)
Recoveries				503		568
Provision				872		1,998
Ending balance		1,641		1,641		1,799
Individually evaluated for impairment		9		9
Collectively evaluated for impairment		1,632		1,632		1,779
Individually evaluated for impairment		32		32		43
Collectively evaluated for impairment		37,445		37,445		38,540
Loans		37,477		37,477		38,583
FUSB and ALC [Member] | Consumer Portfolio Segment [Member] | Branch Retail [Member]
Beginning balance				427	393	393
Charge-offs				(294)		(415)
Recoveries				94		113
Provision				204		336
Ending balance		431		431		427
Collectively evaluated for impairment		431		431		427
Collectively evaluated for impairment		30,008		30,008		28,324
Loans		30,008		30,008		28,324
FUSB and ALC [Member] | Consumer Portfolio Segment [Member] | Indirect Sales [Member]
Beginning balance				145	$ 229	229
Charge-offs				(194)		(116)
Recoveries				6		6
Provision				268		26
Ending balance		225		225		145
Collectively evaluated for impairment		225		225		145
Collectively evaluated for impairment		48,073		48,073		40,609
Loans		$ 48,073		$ 48,073		40,609
FUSB and ALC [Member] | Consumer Portfolio Segment [Member] | FUSB [Member] | Consumer Loans [Member]
Individually evaluated for impairment						$ 20
[1] Includes equipment financing leases.

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