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Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
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Amount of allowance for credit loss on financing receivable evaluated on collective basis. Excludes financing receivable evaluated on individual basis.

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Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
-SubTopic 10
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Amount of allowance for credit loss on financing receivable evaluated on individual basis. Excludes financing receivable evaluated on collective basis.

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Amount of financing receivable collectively evaluated for credit loss. Excludes financing receivable individually evaluated for credit loss.

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Amount of financing receivable individually evaluated for credit loss. Excludes financing receivable collectively evaluated for credit loss.

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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

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Reserve for loan and lease losses.

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Loans and Leases - Allowance for Loan and Lease Losses and Recorded Investment in Loans and Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Allowance For Credit Losses, Loans And Leases [Abstract]
Ending balance: individually analyzed	$ 1,033			$ 834
Ending balance: pooled	85,008			83,003
Financing Receivable, Allowance for Credit Loss	86,041	$ 85,745	$ 85,387	83,837	$ 82,709	$ 79,004
Loans and leases held for investment [Abstract]
Ending balance: individually analyzed	14,815			12,552
Ending balance: pooled	6,715,919			6,562,406
Total Loans and Leases Held for Investment	6,730,734		6,567,214	6,574,958
Commercial, financial and agricultural
Allowance For Credit Losses, Loans And Leases [Abstract]
Ending balance: individually analyzed	1,010			814
Ending balance: pooled	13,679			13,322
Financing Receivable, Allowance for Credit Loss	14,689	14,545	13,699	14,136	13,871	16,920
Loans and leases held for investment [Abstract]
Ending balance: individually analyzed	2,703			1,754
Ending balance: pooled	1,041,340			1,048,250
Total Loans and Leases Held for Investment	1,044,043		989,723	1,050,004
Real estate-commercial
Allowance For Credit Losses, Loans And Leases [Abstract]
Ending balance: individually analyzed	23			20
Ending balance: pooled	46,611			45,259
Financing Receivable, Allowance for Credit Loss	46,634	45,978	45,849	45,279	44,757	41,673
Loans and leases held for investment [Abstract]
Ending balance: individually analyzed	3,680			4,863
Ending balance: pooled	3,438,403			3,270,277
Total Loans and Leases Held for Investment	3,442,083		3,302,798	3,275,140
Real estate-construction
Allowance For Credit Losses, Loans And Leases [Abstract]
Ending balance: individually analyzed	0			0
Ending balance: pooled	5,542			5,732
Financing Receivable, Allowance for Credit Loss	5,542	6,153	6,543	5,732	5,433	4,952
Loans and leases held for investment [Abstract]
Ending balance: individually analyzed	2,799			0
Ending balance: pooled	282,817			427,561
Total Loans and Leases Held for Investment	285,616		394,462	427,561
Real estate-residential secured for business purpose
Allowance For Credit Losses, Loans And Leases [Abstract]
Ending balance: individually analyzed	0			0
Ending balance: pooled	7,650			8,656
Financing Receivable, Allowance for Credit Loss	7,650	7,739	8,692	8,656	8,696	7,054
Loans and leases held for investment [Abstract]
Ending balance: individually analyzed	630			936
Ending balance: pooled	530,044			515,535
Total Loans and Leases Held for Investment	530,674		517,002	516,471
Residential secured for personal purpose
Allowance For Credit Losses, Loans And Leases [Abstract]
Ending balance: individually analyzed	0			0
Ending balance: pooled	6,893			5,842
Financing Receivable, Allowance for Credit Loss	6,893	6,606	6,349	5,842	5,588	3,685
Loans and leases held for investment [Abstract]
Ending balance: individually analyzed	3,985			4,246
Ending balance: pooled	965,577			856,876
Total Loans and Leases Held for Investment	969,562		909,015	861,122
Real estate-home equity secured for personal purpose
Allowance For Credit Losses, Loans And Leases [Abstract]
Ending balance: individually analyzed	0			0
Ending balance: pooled	1,695			1,291
Financing Receivable, Allowance for Credit Loss	1,695	1,688	1,289	1,291	1,296	1,287
Loans and leases held for investment [Abstract]
Ending balance: individually analyzed	1,003			753
Ending balance: pooled	181,898			176,102
Total Loans and Leases Held for Investment	182,901		179,282	176,855
Loans to individuals
Allowance For Credit Losses, Loans And Leases [Abstract]
Ending balance: individually analyzed	0			0
Ending balance: pooled	340			387
Financing Receivable, Allowance for Credit Loss	340	348	392	387	560	351
Loans and leases held for investment [Abstract]
Ending balance: individually analyzed	15			0
Ending balance: pooled	26,779			27,331
Total Loans and Leases Held for Investment	26,794		27,749	27,331
Lease financings
Allowance For Credit Losses, Loans And Leases [Abstract]
Ending balance: individually analyzed	0			0
Ending balance: pooled	2,598			2,514
Financing Receivable, Allowance for Credit Loss	2,598	$ 2,688	2,574	2,514	$ 2,508	$ 3,082
Loans and leases held for investment [Abstract]
Ending balance: individually analyzed	0			0
Ending balance: pooled	249,061			240,474
Total Loans and Leases Held for Investment	$ 249,061		$ 247,183	$ 240,474