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Goodwill and Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Mar. 31, 2022
Finite-lived Intangible Assets [Roll Forward]
Balance, beginning of period	$ 17,047
Balance, end of period	21,255
Less: accumulated amortization	(6,968)	$ (7,605)
Total	14,287	13,650
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
Balance, end of period	17,470
Less: accumulated amortization	(6,212)	(6,671)
Total	11,258	10,799
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
Balance, end of period	3,722
Less: accumulated amortization	(733)	(908)
Total	2,989	2,814
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
Balance, end of period	63
Less: accumulated amortization	(23)	(26)
Total	$ 40	$ 37

X

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004

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- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 926
-SubTopic 20
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=120154696&loc=d3e54445-107959

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- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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