Loans Schedule of loans individually evaluated for impairment by class of loan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance	$ 4,175	$ 2,240
Impaired Financing Receivable, Recorded Investment	78,341	74,502	$ 108,455
Impaired Financing Receivable, Interest Income, Cash Basis Method	1,795	2,770	2,879
6500 Real Estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	49,091	66,824
business assets
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	8,524	14,614
Other Collateral
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	23,125	213
Collateral Pledged
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	80,740	81,651
Commercial Financial And Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment			28,836
Impaired Financing Receivable, Interest Income, Cash Basis Method			735
Commercial Financial And Agricultural [Member] | 6500 Real Estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	8,242	9,321
Commercial Financial And Agricultural [Member] | business assets
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	7,788	13,366
Commercial Financial And Agricultural [Member] | Other Collateral
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	23,125	156
Commercial Financial And Agricultural [Member] | Collateral Pledged
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	39,155	22,843
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment			70,357
Impaired Financing Receivable, Interest Income, Cash Basis Method			1,890
Commercial Real Estate Portfolio Segment [Member] | 6500 Real Estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	35,908	52,901
Commercial Real Estate Portfolio Segment [Member] | business assets
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	28	37
Commercial Real Estate Portfolio Segment [Member] | Other Collateral
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	0	0
Commercial Real Estate Portfolio Segment [Member] | Collateral Pledged
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	35,936	52,938
Construction Real Estate Remaining Commercial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment			3,110
Impaired Financing Receivable, Interest Income, Cash Basis Method	32	39	50
Construction Real Estate Remaining Commercial [Member] | 6500 Real Estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	2,372	1,178
Construction Real Estate Remaining Commercial [Member] | business assets
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	0	0
Construction Real Estate Remaining Commercial [Member] | Other Collateral
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	0	0
Construction Real Estate Remaining Commercial [Member] | Collateral Pledged
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	2,372	1,178
Residential Real Estate Commercial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment			4,557
Impaired Financing Receivable, Interest Income, Cash Basis Method	88	204	204
Residential Real Estate Commercial [Member] | 6500 Real Estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	2,479	2,906
Residential Real Estate Commercial [Member] | business assets
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	0	0
Residential Real Estate Commercial [Member] | Other Collateral
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	0	57
Residential Real Estate Commercial [Member] | Collateral Pledged
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	2,479	2,963
Finance Leases Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment			$ 1,595
Impaired Financing Receivable, Interest Income, Cash Basis Method	33	73
Finance Leases Portfolio Segment [Member] | 6500 Real Estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	0	0
Finance Leases Portfolio Segment [Member] | business assets
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	708	1,211
Finance Leases Portfolio Segment [Member] | Other Collateral
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	0	0
Finance Leases Portfolio Segment [Member] | Collateral Pledged
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	708	1,211
Residential Real Estate Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Interest Income, Cash Basis Method	157	301
Residential Real Estate Mortgage [Member] | 6500 Real Estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	90	370
Residential Real Estate Mortgage [Member] | business assets
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	0	0
Residential Real Estate Mortgage [Member] | Other Collateral
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	0	0
Residential Real Estate Mortgage [Member] | Collateral Pledged
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	90	370
Residential Real Estate Home Equity Line Of Credit [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Interest Income, Cash Basis Method	16	17
Residential Real Estate Home Equity Line Of Credit [Member] | 6500 Real Estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost		148
Residential Real Estate Home Equity Line Of Credit [Member] | business assets
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost		0
Residential Real Estate Home Equity Line Of Credit [Member] | Other Collateral
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost		0
Residential Real Estate Home Equity Line Of Credit [Member] | Collateral Pledged
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost		148
commercial financial agricultural less PPP and overdraft
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Interest Income, Cash Basis Method	438	180
PPP Loans
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Interest Income, Cash Basis Method	0	0
Bank Overdrafts
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Interest Income, Cash Basis Method	0	0
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Interest Income, Cash Basis Method	956	1,844
Construction Real Estate Retail
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Interest Income, Cash Basis Method	13	4
Residential Real Estate Installment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Interest Income, Cash Basis Method	3	2
Consumer Loan [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Interest Income, Cash Basis Method	54	92
GFSC loans
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Interest Income, Cash Basis Method	$ 5	$ 14