Business Combinations (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands					1 Months Ended	12 Months Ended
	Sep. 01, 2022	Sep. 01, 2021	May 03, 2021	Mar. 01, 2020	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Common stock, par value (in dollars per share)		$ 1.00				$ 1	$ 1
Goodwill						$ 96,145	$ 91,565	$ 74,135
Merger-related costs						562	3,701	$ 4,565
Sevier County Bancshares Inc [Member]
Business Acquisition [Line Items]
Common stock, par value (in dollars per share)		0
Sevier County Bancshares Inc [Member]
Business Acquisition [Line Items]
Cash to be paid upon conversion (in dollars per share)		$ 10.17
Common shares to be converted (in shares)		0.4116
Number of shares issued (in shares)		1,692,168
Purchase price/Cash		$ 9,600				9,568
Assets acquired		484,880				477,500
Liabilities assumed		443,099				442,848
Total consideration						51,823
Goodwill		17,200				17,171
Sevier County Bancshares Inc [Member] | Core Deposits [Member]
Business Acquisition [Line Items]
Intangible assets acquired		$ 1,600
Useful life		10 years
Sevier County Bancshares Inc [Member] | Sevier County Bancshares Inc [Member]
Business Acquisition [Line Items]
Threshold number of shares to be held by a shareholder to receive the per share stock consideration		20,000
Fountain [Member]
Business Acquisition [Line Items]
Purchase price/Cash			$ 14,000			59,794
Repayment of indebtedness			45,800
Future cash payments of performance-based earnout			6,000
Assets acquired			54,114			57,848
Liabilities assumed			683			454
Total consideration						59,794
Goodwill			2,400			2,400
Fountain [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets acquired			$ 2,700
Useful life			8 years
Progressive Financial Group Inc. [Member]
Business Acquisition [Line Items]
Cash to be paid upon conversion (in dollars per share)				$ 474.82
Common shares to be converted (in shares)				62.3808
Number of shares issued (in shares)				1,292,578
Purchase price/Cash				$ 9,800		9,838
Assets acquired				301,041		298,322
Liabilities assumed				272,052		272,781
Total consideration						34,385
Goodwill				8,800		8,844
Progressive Financial Group Inc. [Member] | Core Deposits [Member]
Business Acquisition [Line Items]
Intangible assets acquired				$ 1,400
Useful life				10 years
Progressive Financial Group Inc. [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets acquired				$ 1,100
Useful life				10 years
Progressive Financial Group Inc. [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Intangible assets acquired				$ 63
Useful life				5 years
Sunbelt Group LLC [Member]
Business Acquisition [Line Items]
Purchase price/Cash					$ 6,500
Pro forma, revenue of acquiree since acquisition date, actual						702
Pro forma information, earnings (loss) since acquisition date, actual						87
Pro forma revenue						165,418	139,918
Pro forma net income (loss)						42,999	$ 35,430
Assets acquired	$ 349				2,284
Liabilities assumed	364				364
Total consideration	6,500				6,500
Purchase consideration paid in cash	5,200
Goodwill	4,600				$ 4,580
Merger-related costs						$ 24
Sunbelt Group LLC [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets acquired	$ 1,900
Useful life	14 years