Goodwill and Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Finite-lived Intangible Assets [Roll Forward]
Balance, beginning of period	$ 17,047	$ 14,550
Acquisition of business		2,497
Balance, end of period	21,255	17,047
Less: accumulated amortization	(6,968)	(4,711)
Total	14,287	12,336
Fountain Leasing Limited Liability Company [Member]
Finite-lived Intangible Assets [Roll Forward]
Acquisition of business	2,658
Sevier County Bancshares Inc [Member]
Finite-lived Intangible Assets [Roll Forward]
Acquisition of business	1,550
Core Deposits [Member]
Finite-lived Intangible Assets [Roll Forward]
Balance, beginning of period	15,920	14,550
Acquisition of business		1,370
Balance, end of period	17,470	15,920
Less: accumulated amortization	(6,212)	(4,540)
Total	11,258	11,380
Core Deposits [Member] | Sevier County Bancshares Inc [Member]
Finite-lived Intangible Assets [Roll Forward]
Acquisition of business	1,550
Customer Relationships [Member]
Finite-lived Intangible Assets [Roll Forward]
Balance, beginning of period	1,064
Acquisition of business		1,064
Balance, end of period	3,722	1,064
Less: accumulated amortization	(733)	(161)
Total	2,989	903
Customer Relationships [Member] | Fountain Leasing Limited Liability Company [Member]
Finite-lived Intangible Assets [Roll Forward]
Acquisition of business	2,658
Trade Names [Member]
Finite-lived Intangible Assets [Roll Forward]
Balance, beginning of period	63
Acquisition of business		63
Balance, end of period	63	63
Less: accumulated amortization	(23)	(10)
Total	$ 40	$ 53