Loans Held for Investment - Aging of Modified Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Mar. 31, 2026
30-59 Days
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Modified Loans	$ 172	$ 5,987
60-89 Days
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Modified Loans	686	1,048
90 Days or More
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Modified Loans	1,786	1,282
Past Due
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Modified Loans	2,644	8,317
Not Past Due
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Modified Loans	15,948	11,159
Commercial real estate | Non-owner occupied | 30-59 Days
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Modified Loans		304
Commercial real estate | Non-owner occupied | 60-89 Days
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Modified Loans	316
Commercial real estate | Non-owner occupied | Past Due
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Modified Loans	316	304
Commercial real estate | Non-owner occupied | Not Past Due
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Modified Loans	316	304
Commercial real estate | Owner occupied | 30-59 Days
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Modified Loans	4	2,071
Commercial real estate | Owner occupied | Past Due
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Modified Loans	4	2,071
Commercial real estate | Owner occupied | Not Past Due
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Modified Loans	4	344
Commercial and industrial
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Loans modified and subsequently charged off	18,700
Commercial and industrial | 30-59 Days
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Modified Loans	168	3,612
Commercial and industrial | 60-89 Days
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Modified Loans	370	1,048
Commercial and industrial | 90 Days or More
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Modified Loans	1,786	1,282
Commercial and industrial | Past Due
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Modified Loans	2,324	5,942
Commercial and industrial | Not Past Due
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Modified Loans	15,606	9,785
1-4 family residential | Not Past Due
Non-Covered Loans and Allowance for Non-Covered Loan Losses
Modified Loans	$ 22	$ 726