Loans and Allowance for Credit Losses - Age Analysis of Past Due Loans, Excluding Loans Acquired, Segregated by Class of Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 17,005,937	$ 16,845,670
90 Days Past Due & Accruing	603	1,147
Gross 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	48,196	55,666
90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	81,698	42,701
Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	129,894	98,367
Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	16,876,043	16,747,303
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	308,994	318,666
90 Days Past Due & Accruing	529	791
Consumer | Gross 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	3,576	3,205
Consumer | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,016	1,108
Consumer | Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	4,592	4,313
Consumer | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	304,402	314,353
Consumer | Credit cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	181,675	191,204
90 Days Past Due & Accruing	529	791
Consumer | Credit cards | Gross 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,824	1,734
Consumer | Credit cards | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	635	892
Consumer | Credit cards | Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,459	2,626
Consumer | Credit cards | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	179,216	188,578
Consumer | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	127,319	127,462
90 Days Past Due & Accruing	0	0
Consumer | Other consumer | Gross 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,752	1,471
Consumer | Other consumer | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	381	216
Consumer | Other consumer | Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,133	1,687
Consumer | Other consumer | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	125,186	125,775
Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	13,391,531	13,338,186
90 Days Past Due & Accruing	0	7
Real Estate | Gross 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	40,416	38,570
Real Estate | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	53,516	18,324
Real Estate | Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	93,932	56,894
Real Estate | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	13,297,599	13,281,292
Real Estate | Construction and development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,789,249	3,144,220
90 Days Past Due & Accruing	0	0
Real Estate | Construction and development | Gross 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	332	3,171
Real Estate | Construction and development | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	10,530	2,190
Real Estate | Construction and development | Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	10,862	5,361
Real Estate | Construction and development | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,778,387	3,138,859
Real Estate | Single family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,689,946	2,641,556
90 Days Past Due & Accruing	0	7
Real Estate | Single family residential | Gross 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	34,651	30,697
Real Estate | Single family residential | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	16,013	12,522
Real Estate | Single family residential | Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	50,664	43,219
Real Estate | Single family residential | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,639,282	2,598,337
Real Estate | Other commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	7,912,336	7,552,410
90 Days Past Due & Accruing	0	0
Real Estate | Other commercial | Gross 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	5,433	4,702
Real Estate | Other commercial | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	26,973	3,612
Real Estate | Other commercial | Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	32,406	8,314
Real Estate | Other commercial | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	7,879,930	7,544,096
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,695,329	2,722,886
90 Days Past Due & Accruing	74	349
Commercial | Gross 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	3,928	13,891
Commercial | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	27,163	23,266
Commercial | Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	31,091	37,157
Commercial | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,664,238	2,685,729
Commercial | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,434,175	2,490,176
90 Days Past Due & Accruing	74	349
Commercial | Commercial | Gross 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	3,535	13,799
Commercial | Commercial | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	27,059	22,750
Commercial | Commercial | Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	30,594	36,549
Commercial | Commercial | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,403,581	2,453,627
Commercial | Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	261,154	232,710
90 Days Past Due & Accruing	0	0
Commercial | Agricultural | Gross 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	393	92
Commercial | Agricultural | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	104	516
Commercial | Agricultural | Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	497	608
Commercial | Agricultural | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	260,657	232,102
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	610,083	465,932
90 Days Past Due & Accruing	0	0
Other | Gross 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	276	0
Other | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	3	3
Other | Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	279	3
Other | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 609,804	$ 465,929