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Loans and Allowance for Loan Losses - Aging Analysis of Past Due Loans (Details) - USD ($) $ in Thousands		Sep. 30, 2019	Dec. 31, 2018
Loans		$ 555,338	$ 525,870
FUSB [Member]
Loans		441,849	417,496
Total Past Due		4,793	6,214
Current		437,056	411,282
FUSB [Member] | Financial Asset, 30 to 59 Days Past Due
Loans		4,566	4,552
FUSB [Member] | Financial Asset, 60 to 89 Days Past Due
Loans		212	661
FUSB [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans		15	1,001
ALC [Member]
Loans		113,489	108,374
Total Past Due		2,119	2,796
Current		111,370	105,578
ALC [Member] | Financial Asset, 30 to 59 Days Past Due
Loans		911	971
ALC [Member] | Financial Asset, 60 to 89 Days Past Due
Loans		423	596
ALC [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans		785	1,229
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]
Loans		27,348	41,340
Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member]
Loans		109,336	110,756
Real Estate [Member] | Secured By Multi family Residential Properties [Member]
Loans		46,843	23,009
Real Estate [Member] | Secured By Non-farm Non residential Properties [Member]
Loans		164,941	156,162
Real Estate [Member] | Other Real Estate Loans [Member]
Loans		842	1,308
Real Estate [Member] | FUSB [Member] | Construction, Land Development and Other Land Loans [Member]
Loans		27,348	41,340
Total Past Due		349	1,071
Current		26,999	40,269
Real Estate [Member] | FUSB [Member] | Construction, Land Development and Other Land Loans [Member] | Financial Asset, 30 to 59 Days Past Due
Loans		349	415
Real Estate [Member] | FUSB [Member] | Construction, Land Development and Other Land Loans [Member] | Financial Asset, 60 to 89 Days Past Due
Loans			582
Real Estate [Member] | FUSB [Member] | Construction, Land Development and Other Land Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans			74
Real Estate [Member] | FUSB [Member] | Secured by 1-4 Family Residential Properties [Member]
Loans		103,269	102,971
Total Past Due		2,161	1,566
Current		101,108	101,405
Real Estate [Member] | FUSB [Member] | Secured by 1-4 Family Residential Properties [Member] | Financial Asset, 30 to 59 Days Past Due
Loans		1,949	991
Real Estate [Member] | FUSB [Member] | Secured by 1-4 Family Residential Properties [Member] | Financial Asset, 60 to 89 Days Past Due
Loans		212	36
Real Estate [Member] | FUSB [Member] | Secured by 1-4 Family Residential Properties [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans			539
Real Estate [Member] | FUSB [Member] | Secured By Multi family Residential Properties [Member]
Loans		46,843	23,009
Current		46,843	23,009
Real Estate [Member] | FUSB [Member] | Secured By Non-farm Non residential Properties [Member]
Loans		164,941	156,162
Total Past Due		1,348	471
Current		163,593	155,691
Real Estate [Member] | FUSB [Member] | Secured By Non-farm Non residential Properties [Member] | Financial Asset, 30 to 59 Days Past Due
Loans		1,334	458
Real Estate [Member] | FUSB [Member] | Secured By Non-farm Non residential Properties [Member] | Financial Asset, 60 to 89 Days Past Due
Loans			13
Real Estate [Member] | FUSB [Member] | Secured By Non-farm Non residential Properties [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans		14
Real Estate [Member] | FUSB [Member] | Other Real Estate Loans [Member]
Loans		842	1,308
Current		842	1,308
Real Estate [Member] | ALC [Member] | Secured by 1-4 Family Residential Properties [Member]
Loans		6,067	7,785
Total Past Due		191	253
Current		5,876	7,532
Real Estate [Member] | ALC [Member] | Secured by 1-4 Family Residential Properties [Member] | Financial Asset, 30 to 59 Days Past Due
Loans		60	60
Real Estate [Member] | ALC [Member] | Secured by 1-4 Family Residential Properties [Member] | Financial Asset, 60 to 89 Days Past Due
Loans			65
Real Estate [Member] | ALC [Member] | Secured by 1-4 Family Residential Properties [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans		131	128
Commercial and Industrial Loans [Member]
Loans	[1]	90,470	85,779
Commercial and Industrial Loans [Member] | FUSB [Member]
Loans	[1]	90,470	85,779
Total Past Due		918	3,022
Current		89,552	82,757
Commercial and Industrial Loans [Member] | FUSB [Member] | Financial Asset, 30 to 59 Days Past Due
Loans		918	2,608
Commercial and Industrial Loans [Member] | FUSB [Member] | Financial Asset, 60 to 89 Days Past Due
Loans			30
Commercial and Industrial Loans [Member] | FUSB [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans			384
Consumer Portfolio Segment [Member] | Consumer Loans [Member]
Loans		37,477	38,583
Consumer Portfolio Segment [Member] | Branch Retail [Member]
Loans		30,008	28,324
Consumer Portfolio Segment [Member] | Indirect Sales [Member]
Loans		48,073	40,609
Consumer Portfolio Segment [Member] | FUSB [Member]
Loans		8,136	6,927
Total Past Due		17
Current		8,119
Consumer Portfolio Segment [Member] | FUSB [Member] | Financial Asset, 30 to 59 Days Past Due
Loans		16
Consumer Portfolio Segment [Member] | FUSB [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans		1
Consumer Portfolio Segment [Member] | FUSB [Member] | Consumer Loans [Member]
Loans		8,136	6,927
Total Past Due			84
Current			6,843
Consumer Portfolio Segment [Member] | FUSB [Member] | Consumer Loans [Member] | Financial Asset, 30 to 59 Days Past Due
Loans			80
Consumer Portfolio Segment [Member] | FUSB [Member] | Consumer Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans			4
Consumer Portfolio Segment [Member] | ALC [Member] | Consumer Loans [Member]
Loans		29,341	31,656
Total Past Due		1,244	1,747
Current		28,097	29,909
Consumer Portfolio Segment [Member] | ALC [Member] | Consumer Loans [Member] | Financial Asset, 30 to 59 Days Past Due
Loans		535	563
Consumer Portfolio Segment [Member] | ALC [Member] | Consumer Loans [Member] | Financial Asset, 60 to 89 Days Past Due
Loans		275	354
Consumer Portfolio Segment [Member] | ALC [Member] | Consumer Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans		434	830
Consumer Portfolio Segment [Member] | ALC [Member] | Branch Retail [Member]
Loans		30,008	28,324
Total Past Due		345	415
Current		29,663	27,909
Consumer Portfolio Segment [Member] | ALC [Member] | Branch Retail [Member] | Financial Asset, 30 to 59 Days Past Due
Loans		122	164
Consumer Portfolio Segment [Member] | ALC [Member] | Branch Retail [Member] | Financial Asset, 60 to 89 Days Past Due
Loans		73	98
Consumer Portfolio Segment [Member] | ALC [Member] | Branch Retail [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans		150	153
Consumer Portfolio Segment [Member] | ALC [Member] | Indirect Sales [Member]
Loans		48,073	40,609
Total Past Due		339	381
Current		47,734	40,228
Consumer Portfolio Segment [Member] | ALC [Member] | Indirect Sales [Member] | Financial Asset, 30 to 59 Days Past Due
Loans		194	184
Consumer Portfolio Segment [Member] | ALC [Member] | Indirect Sales [Member] | Financial Asset, 60 to 89 Days Past Due
Loans		75	79
Consumer Portfolio Segment [Member] | ALC [Member] | Indirect Sales [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans		$ 70	$ 118
[1] Includes equipment financing leases.

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