Allowance for Loan Losses Composition (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	$ 4,983,000	$ 3,566,000
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	78,762,000	81,813,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses	0	0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	83,745,000	85,379,000	$ 83,197,000	$ 85,675,000
Financing Receivable, Individually Evaluated for Impairment	45,215,000	78,341,000
Financing Receivable, Collectively Evaluated for Impairment	7,428,171,000	7,058,897,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	2,835,000	4,653,000
Loans and Leases Receivable, Net of Deferred Income	$ 7,476,221,000	$ 7,141,891,000
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans, Individually Evaluated for Impairment	11.02%	4.55%
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans, Collectively Evaluated for Impairment	1.06%	1.16%
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance as a percentage of loan balance	0.00%	0.00%
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans	1.12%	1.20%
PPP loans originated	$ 2,100,000	$ 4,200,000
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		383,000		6,090,000
Commercial Financial And Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	4,980,000	3,426,000
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	10,516,000	13,561,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses	0	0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	15,496,000	16,987,000	14,025,000	25,608,000
Financing Receivable, Individually Evaluated for Impairment	21,228,000	41,307,000
Financing Receivable, Collectively Evaluated for Impairment	1,274,390,000	1,259,524,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	22,000	102,000
Loans and Leases Receivable, Net of Deferred Income	$ 1,295,640,000	$ 1,300,933,000
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans, Individually Evaluated for Impairment	23.46%	8.29%
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans, Collectively Evaluated for Impairment	0.83%	1.08%
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance as a percentage of loan balance	0.00%	0.00%
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans	1.20%	1.31%
Commercial Financial And Agricultural [Member] | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		$ 222,000		(8,257,000)
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	$ 3,000	131,000
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	16,371,000	17,698,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses	0	0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	16,374,000	17,829,000	25,466,000	23,480,000
Financing Receivable, Individually Evaluated for Impairment	20,740,000	32,423,000
Financing Receivable, Collectively Evaluated for Impairment	1,853,383,000	1,758,118,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	1,870,000	3,513,000
Loans and Leases Receivable, Net of Deferred Income	$ 1,875,993,000	$ 1,794,054,000
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans, Individually Evaluated for Impairment	0.01%	0.40%
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans, Collectively Evaluated for Impairment	0.88%	1.01%
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance as a percentage of loan balance	0.00%	0.00%
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans	0.87%	0.99%
Commercial Real Estate Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		$ 181,000		2,119,000
Construction Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	$ 0	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	5,227,000	5,550,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses	0	0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	5,227,000	5,550,000	5,758,000	7,288,000
Financing Receivable, Individually Evaluated for Impairment	504,000	1,712,000
Financing Receivable, Collectively Evaluated for Impairment	303,969,000	323,043,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	626,000	660,000
Loans and Leases Receivable, Net of Deferred Income	$ 305,099,000	$ 325,415,000
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans, Individually Evaluated for Impairment	0.00%	0.00%
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans, Collectively Evaluated for Impairment	1.72%	1.72%
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance as a percentage of loan balance	0.00%	0.00%
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans	1.71%	1.71%
Construction Real Estate [Member] | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		$ 0		(1,898,000)
Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	$ 0	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	18,818,000	16,831,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses	0	0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	18,818,000	16,831,000	11,424,000	11,363,000
Financing Receivable, Individually Evaluated for Impairment	2,670,000	2,191,000
Financing Receivable, Collectively Evaluated for Impairment	2,026,537,000	1,794,302,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	317,000	378,000
Loans and Leases Receivable, Net of Deferred Income	$ 2,029,524,000	$ 1,796,871,000
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans, Individually Evaluated for Impairment	0.00%	0.00%
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans, Collectively Evaluated for Impairment	0.93%	0.94%
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance as a percentage of loan balance	0.00%	0.00%
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans	0.93%	0.94%
Residential Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		$ (20,000)		3,121,000
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	$ 0	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	27,713,000	28,021,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses	0	0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	27,713,000	28,021,000	26,286,000	17,418,000
Financing Receivable, Individually Evaluated for Impairment	0	0
Financing Receivable, Collectively Evaluated for Impairment	1,945,936,000	1,904,981,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	0	0
Loans and Leases Receivable, Net of Deferred Income	$ 1,945,936,000	$ 1,904,981,000
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans, Individually Evaluated for Impairment	0.00%	0.00%
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans, Collectively Evaluated for Impairment	1.42%	1.47%
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance as a percentage of loan balance	0.00%	0.00%
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans	1.42%	1.47%
Consumer Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		$ 0		10,925,000
Finance Leases Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	$ 0	9,000
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	117,000	152,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses	0	0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	117,000	161,000	$ 238,000	518,000
Financing Receivable, Individually Evaluated for Impairment	73,000	708,000
Financing Receivable, Collectively Evaluated for Impairment	23,956,000	18,929,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance	0	0
Loans and Leases Receivable, Net of Deferred Income	$ 24,029,000	$ 19,637,000
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans, Individually Evaluated for Impairment	0.00%	1.27%
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans, Collectively Evaluated for Impairment	0.49%	0.80%
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance as a percentage of loan balance	0.00%	0.00%
Loans And Leases Receivable, Ratio Of Allowance For Loan Losses To Total Loans	0.49%	0.82%
Finance Leases Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		$ 0		$ 80,000