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	Sep. 30, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Business Acquisition [Line Items]
Goodwill					$ 96,145	$ 96,145	$ 91,565
Common stock, par value (in dollars per share)		$ 1.00			$ 1	$ 1
Sevier County Bancshares Inc [Member]
Business Acquisition [Line Items]
Common stock, par value (in dollars per share)		0
Fountain [Member]
Business Acquisition [Line Items]
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
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
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
Sunbelt Group LLC [Member]
Business Acquisition [Line Items]
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
Sunbelt Group LLC [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets acquired	$ 1,900
Useful life	14 years