Loans and Leases - Age Analysis of Past Due Loans and Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing Loans and Leases	$ 6,821,911	$ 6,813,916
Nonaccrual Loans and Leases	11,126	12,667
Total Loans and Leases Held for Investment	6,833,037	6,826,583	$ 6,579,086
30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	22,066	12,217
60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	3,102	4,512
90 Days or more Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	322	321
Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	25,490	17,050
Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	6,796,421	6,796,866
Commercial, financial and agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing Loans and Leases	1,030,117	1,034,040
Nonaccrual Loans and Leases	4,244	3,795
Total Loans and Leases Held for Investment	1,034,361	1,037,835	1,014,568
Commercial, financial and agricultural | 30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	2,588	1,750
Commercial, financial and agricultural | 60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	1,321	723
Commercial, financial and agricultural | 90 Days or more Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	0	0
Commercial, financial and agricultural | Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	3,909	2,473
Commercial, financial and agricultural | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	1,026,208	1,031,567
Real estate-commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing Loans and Leases	3,542,876	3,527,772
Nonaccrual Loans and Leases	3,526	2,679
Total Loans and Leases Held for Investment	3,546,402	3,530,451	3,283,729
Real estate-commercial | 30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	11,424	415
Real estate-commercial | 60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	0	2,919
Real estate-commercial | 90 Days or more Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	0	0
Real estate-commercial | Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	11,424	3,334
Real estate-commercial | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	3,531,452	3,524,438
Real estate-construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing Loans and Leases	281,785	274,483
Nonaccrual Loans and Leases	0	0
Total Loans and Leases Held for Investment	281,785	274,483	379,995
Real estate-construction | 30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	715	3,659
Real estate-construction | 60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	0	0
Real estate-construction | 90 Days or more Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	0	0
Real estate-construction | Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	715	3,659
Real estate-construction | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	281,070	270,824
Real estate-residential secured for business purpose
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing Loans and Leases	535,633	535,509
Nonaccrual Loans and Leases	449	586
Total Loans and Leases Held for Investment	536,082	536,095	524,196
Real estate-residential secured for business purpose | 30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	825	1,077
Real estate-residential secured for business purpose | 60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	263	0
Real estate-residential secured for business purpose | 90 Days or more Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	0	0
Real estate-residential secured for business purpose | Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	1,088	1,077
Real estate-residential secured for business purpose | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	534,545	534,432
Real estate-residential secured for personal purpose
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing Loans and Leases	991,535	991,167
Nonaccrual Loans and Leases	1,232	3,805
Total Loans and Leases Held for Investment	992,767	994,972	922,412
Real estate-residential secured for personal purpose | 30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	4,409	3,040
Real estate-residential secured for personal purpose | 60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	0	0
Real estate-residential secured for personal purpose | 90 Days or more Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	0	0
Real estate-residential secured for personal purpose | Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	4,409	3,040
Real estate-residential secured for personal purpose | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	987,126	988,127
Real estate-home equity secured for personal purpose
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing Loans and Leases	188,031	185,645
Nonaccrual Loans and Leases	1,088	1,191
Total Loans and Leases Held for Investment	189,119	186,836	177,446
Real estate-home equity secured for personal purpose | 30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	873	1,063
Real estate-home equity secured for personal purpose | 60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	863	309
Real estate-home equity secured for personal purpose | 90 Days or more Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	0	0
Real estate-home equity secured for personal purpose | Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	1,736	1,372
Real estate-home equity secured for personal purpose | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	186,295	184,273
Loans to individuals
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing Loans and Leases	16,930	21,250
Nonaccrual Loans and Leases	0	0
Total Loans and Leases Held for Investment	16,930	21,250	27,200
Loans to individuals | 30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	214	187
Loans to individuals | 60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	96	59
Loans to individuals | 90 Days or more Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	10	24
Loans to individuals | Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	320	270
Loans to individuals | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	16,610	20,980
Lease financings
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing Loans and Leases	235,004	244,050
Nonaccrual Loans and Leases	587	611
Total Loans and Leases Held for Investment	235,591	244,661	$ 249,540
Lease financings | 30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	1,018	1,026
Lease financings | 60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	559	502
Lease financings | 90 Days or more Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	312	297
Lease financings | Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	1,889	1,825
Lease financings | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment	$ 233,115	$ 242,225