Loans and Allowance for Credit Losses on Loans HFI - Payment Status Recorded Investment (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Mar. 31, 2024
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified	$ 7,636	$ 24,933
Nonaccrual loans	4,136	244
30-89 days past due and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified	381	0
90 days or  more and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified	0	0
Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified	3,119	24,689
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified	2,280	179
Nonaccrual loans	2,128	179
Commercial and industrial | 30-89 days past due and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified	0	0
Commercial and industrial | 90 days or  more and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified	0	0
Commercial and industrial | Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified	152	0
Construction
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified	2,547	14,316
Nonaccrual loans	2,008	0
Construction | 30-89 days past due and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified	0	0
Construction | 90 days or  more and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified	0	0
Construction | Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified	539	14,316
Residential real estate: | 1-to-4 family mortgage
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified	2,465	65
Nonaccrual loans	0	65
Residential real estate: | Residential line of credit
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified	28
Nonaccrual loans	0
Residential real estate: | Owner-occupied
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified	143
Nonaccrual loans	0
Residential real estate: | Non-owner occupied
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified		10,351
Nonaccrual loans		0
Residential real estate: | 30-89 days past due and accruing interest | 1-to-4 family mortgage
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified	367	0
Residential real estate: | 30-89 days past due and accruing interest | Residential line of credit
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified	0
Residential real estate: | 30-89 days past due and accruing interest | Owner-occupied
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified	0
Residential real estate: | 30-89 days past due and accruing interest | Non-owner occupied
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified		0
Residential real estate: | 90 days or  more and accruing interest | 1-to-4 family mortgage
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified	0	0
Residential real estate: | 90 days or  more and accruing interest | Residential line of credit
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified	0
Residential real estate: | 90 days or  more and accruing interest | Owner-occupied
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified	0
Residential real estate: | 90 days or  more and accruing interest | Non-owner occupied
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified		0
Residential real estate: | Loans current on payments and accruing interest | 1-to-4 family mortgage
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified	2,098	0
Residential real estate: | Loans current on payments and accruing interest | Residential line of credit
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified	28
Residential real estate: | Loans current on payments and accruing interest | Owner-occupied
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified	143
Residential real estate: | Loans current on payments and accruing interest | Non-owner occupied
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified		10,351
Consumer and other
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified	173	22
Nonaccrual loans	0	0
Consumer and other | 30-89 days past due and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified	14	0
Consumer and other | 90 days or  more and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified	0	0
Consumer and other | Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans held for investment, modified	$ 159	$ 22