Loans Schedule of loans individually evaluated for impairment by class of loan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance	$ 2,240	$ 5,434
Impaired Financing Receivable, Unpaid Principal Balance		109,062
Impaired Financing Receivable, Recorded Investment	74,502	108,455	$ 77,491
Impaired Financing Receivable, Interest Income, Cash Basis Method	2,770	2,879	1,893
6500 Real Estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	66,824
business assets
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	14,614
Other Collateral
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	213
Collateral Pledged
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	81,651
Commercial Financial And Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment		28,836	33,088
Impaired Financing Receivable, Interest Income, Cash Basis Method		735	527
Commercial Financial And Agricultural [Member] | 6500 Real Estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	9,321
Commercial Financial And Agricultural [Member] | business assets
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	13,366
Commercial Financial And Agricultural [Member] | Other Collateral
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	156
Commercial Financial And Agricultural [Member] | Collateral Pledged
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	22,843
Commercial Financial And Agricultural [Member] | Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		23,316
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		22,970
Commercial Financial And Agricultural [Member] | Financing Receivable With Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance		3,758
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		5,881
Impaired Financing Receivable, Recorded Investment		5,866
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment		70,357	41,791
Impaired Financing Receivable, Interest Income, Cash Basis Method		1,890	1,241
Commercial Real Estate Portfolio Segment [Member] | 6500 Real Estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	52,901
Commercial Real Estate Portfolio Segment [Member] | business assets
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	37
Commercial Real Estate Portfolio Segment [Member] | Other Collateral
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	0
Commercial Real Estate Portfolio Segment [Member] | Collateral Pledged
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	52,938
Commercial Real Estate Portfolio Segment [Member] | Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		63,639
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		63,467
Commercial Real Estate Portfolio Segment [Member] | Financing Receivable With Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance		1,316
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		6,890
Impaired Financing Receivable, Recorded Investment		6,890
Construction Real Estate Remaining Commercial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment		3,110	453
Impaired Financing Receivable, Interest Income, Cash Basis Method	39	50	26
Construction Real Estate Remaining Commercial [Member] | 6500 Real Estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	1,178
Construction Real Estate Remaining Commercial [Member] | business assets
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	0
Construction Real Estate Remaining Commercial [Member] | Other Collateral
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	0
Construction Real Estate Remaining Commercial [Member] | Collateral Pledged
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	1,178
Construction Real Estate Remaining Commercial [Member] | Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		3,110
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		3,110
Construction Real Estate Remaining Commercial [Member] | Financing Receivable With Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance		0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		0
Impaired Financing Receivable, Recorded Investment		0
Residential Real Estate Commercial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment		4,557	2,025
Impaired Financing Receivable, Interest Income, Cash Basis Method	204	204	99
Residential Real Estate Commercial [Member] | 6500 Real Estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	2,906
Residential Real Estate Commercial [Member] | business assets
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	0
Residential Real Estate Commercial [Member] | Other Collateral
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	57
Residential Real Estate Commercial [Member] | Collateral Pledged
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	2,963
Residential Real Estate Commercial [Member] | Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		4,522
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		4,448
Residential Real Estate Commercial [Member] | Financing Receivable With Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance		16
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		109
Impaired Financing Receivable, Recorded Investment		109
Finance Leases Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment		1,595	$ 134
Impaired Financing Receivable, Interest Income, Cash Basis Method	73
Finance Leases Portfolio Segment [Member] | 6500 Real Estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	0
Finance Leases Portfolio Segment [Member] | business assets
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	1,211
Finance Leases Portfolio Segment [Member] | Other Collateral
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	0
Finance Leases Portfolio Segment [Member] | Collateral Pledged
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	1,211
Finance Leases Portfolio Segment [Member] | Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		568
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		568
Finance Leases Portfolio Segment [Member] | Financing Receivable With Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance		344
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		1,027
Impaired Financing Receivable, Recorded Investment		$ 1,027
Residential Real Estate Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Interest Income, Cash Basis Method	301
Residential Real Estate Mortgage [Member] | 6500 Real Estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	370
Residential Real Estate Mortgage [Member] | business assets
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	0
Residential Real Estate Mortgage [Member] | Other Collateral
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	0
Residential Real Estate Mortgage [Member] | Collateral Pledged
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable Amortized Cost	370
Residential Real Estate Home Equity Line Of Credit [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Interest Income, Cash Basis Method	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	180
PPP Loans
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Interest Income, Cash Basis Method	0
Bank Overdrafts
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Interest Income, Cash Basis Method	0
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Interest Income, Cash Basis Method	1,844
Construction Real Estate Retail
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Interest Income, Cash Basis Method	4
Residential Real Estate Installment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Interest Income, Cash Basis Method	2
Consumer Loan [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Interest Income, Cash Basis Method	92
GFSC loans
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Interest Income, Cash Basis Method	14
Check Loans
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Interest Income, Cash Basis Method