Loans Held for Investment - Aging (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	$ 8,672,927	$ 8,311,952
Accruing Loans Past Due 90 Days or More		70
30-59 Days
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	22,871	11,831
60-89 Days
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	9,649	12,200
90 Days or More
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	17,801	21,326
Past Due
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	50,321	45,357
Not Past Due
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	8,622,606	8,266,595
Prime Lending \| U S Government Agencies Secured
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Accruing Loans Past Due 90 Days or More	40,200	33,700
Unpaid principal balance loans past due 90 days or more	40,700	34,300
Commercial real estate \| Non-owner occupied
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	2,255,080	2,121,087
Commercial real estate \| Non-owner occupied \| 30-59 Days
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	2,522	1,138
Commercial real estate \| Non-owner occupied \| 60-89 Days
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	497	1,635
Commercial real estate \| Non-owner occupied \| 90 Days or More
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	2,895	681
Commercial real estate \| Non-owner occupied \| Past Due
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	5,914	3,454
Commercial real estate \| Non-owner occupied \| Not Past Due
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	2,249,166	2,117,633
Commercial real estate \| Owner occupied
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	1,559,387	1,533,173
Commercial real estate \| Owner occupied \| 30-59 Days
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	2,426	2,281
Commercial real estate \| Owner occupied \| 60-89 Days
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	4,722	4,980
Commercial real estate \| Owner occupied \| 90 Days or More
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	923	1,518
Commercial real estate \| Owner occupied \| Past Due
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	8,071	8,779
Commercial real estate \| Owner occupied \| Not Past Due
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	1,551,316	1,524,394
Commercial and industrial
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	1,589,677	1,526,467
Commercial and industrial \| 30-59 Days
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	5,196	1,577
Commercial and industrial \| 60-89 Days
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	596	1,106
Commercial and industrial \| 90 Days or More
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	11,203	13,485
Commercial and industrial \| Past Due
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	16,995	16,168
Commercial and industrial \| Not Past Due
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	1,572,682	1,510,299
Construction and land development
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	955,407	894,011
Construction and land development \| 30-59 Days
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	8,458	711
Construction and land development \| 60-89 Days
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	785	1,009
Construction and land development \| 90 Days or More
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans		500
Construction and land development \| Past Due
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	9,243	2,220
Construction and land development \| Not Past Due
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	946,164	891,791
1-4 family residential
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	1,880,058	1,861,654
Accruing Loans Past Due 90 Days or More		42
1-4 family residential \| 30-59 Days
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	4,123	5,992
1-4 family residential \| 60-89 Days
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	2,983	3,425
1-4 family residential \| 90 Days or More
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	2,780	5,114
1-4 family residential \| Past Due
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	9,886	14,531
1-4 family residential \| Not Past Due
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	1,870,172	1,847,123
Consumer
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	26,977	31,027
Accruing Loans Past Due 90 Days or More		28
Consumer \| 30-59 Days
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	146	132
Consumer \| 60-89 Days
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	66	45
Consumer \| 90 Days or More
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans		28
Consumer \| Past Due
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	212	205
Consumer \| Not Past Due
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	26,765	30,822
Broker-dealer
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	406,341	344,533
Broker-dealer \| Not Past Due
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans	$ 406,341	$ 344,533