Loans and Allowance for Credit Losses - Amortized Cost Basis of Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Mar. 31, 2025
Term Modification
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivables, modified after twelve months	$ 1,748	$ 0
Term Modification \| Commercial real estate: \| Owner occupied properties
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivables, modified after twelve months	0
Term Modification \| Residential real estate: \| 1-4 family residential properties secured by junior liens and revolving secured by 1-4 family first liens
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivables, modified after twelve months	372	$ 0
Term Modification \| Other construction, land development and raw land loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivables, modified after twelve months	1
Term and payment modifications
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivables, modified after twelve months	733
Term and payment modifications \| Commercial real estate: \| Owner occupied properties
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivables, modified after twelve months	733
Term and payment modifications \| Residential real estate: \| 1-4 family residential properties secured by junior liens and revolving secured by 1-4 family first liens
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivables, modified after twelve months	0
Term and payment modifications \| Other construction, land development and raw land loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivables, modified after twelve months	$ 0