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, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 16,142,124	$ 12,012,503
90 Days Past Due & Accruing	507	349
Gross 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	38,416	20,722
90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	26,886	32,907
Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	65,302	53,629
Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	16,076,822	11,958,874
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	349,810	355,370
90 Days Past Due & Accruing	225	247
Consumer | Gross 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,149	1,996
Consumer | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	623	543
Consumer | Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,772	2,539
Consumer | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	347,038	352,831
Consumer | Credit cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	196,928	187,052
90 Days Past Due & Accruing	225	247
Consumer | Credit cards | Gross 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,297	847
Consumer | Credit cards | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	409	413
Consumer | Credit cards | Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,706	1,260
Consumer | Credit cards | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	195,222	185,792
Consumer | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	152,882	168,318
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	852	1,149
Consumer | Other consumer | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	214	130
Consumer | Other consumer | Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,066	1,279
Consumer | Other consumer | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	151,816	167,039
Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	12,581,262	9,167,250
90 Days Past Due & Accruing	106	102
Real Estate | Gross 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	31,061	13,901
Real Estate | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	18,618	22,170
Real Estate | Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	49,679	36,071
Real Estate | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	12,531,583	9,131,179
Real Estate | Construction and development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,566,649	1,326,371
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	4,677	114
Real Estate | Construction and development | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	443	504
Real Estate | Construction and development | Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	5,120	618
Real Estate | Construction and development | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,561,529	1,325,753
Real Estate | Single family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,546,115	2,101,975
90 Days Past Due & Accruing	106	102
Real Estate | Single family residential | Gross 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	23,625	11,313
Real Estate | Single family residential | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	11,075	9,398
Real Estate | Single family residential | Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	34,700	20,711
Real Estate | Single family residential | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,511,415	2,081,264
Real Estate | Other commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	7,468,498	5,738,904
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	2,759	2,474
Real Estate | Other commercial | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	7,100	12,268
Real Estate | Other commercial | Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	9,859	14,742
Real Estate | Other commercial | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	7,458,639	5,724,162
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,837,913	2,160,760
90 Days Past Due & Accruing	176	0
Commercial | Gross 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	5,145	4,825
Commercial | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	7,642	10,191
Commercial | Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	12,787	15,016
Commercial | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,825,126	2,145,744
Commercial | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,632,290	1,992,043
90 Days Past Due & Accruing	176	0
Commercial | Commercial | Gross 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	5,034	4,812
Commercial | Commercial | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	7,575	10,074
Commercial | Commercial | Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	12,609	14,886
Commercial | Commercial | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	2,619,681	1,977,157
Commercial | Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	205,623	168,717
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	111	13
Commercial | Agricultural | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	67	117
Commercial | Agricultural | Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	178	130
Commercial | Agricultural | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	205,445	168,587
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	373,139	329,123
90 Days Past Due & Accruing	0	0
Other | Gross 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	61	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	64	3
Other | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 373,075	$ 329,120