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Loans and Allowance for Credit Losses - Modifications (Details) $ in Thousands	12 Months Ended
	Mar. 31, 2025 USD ($)
Financing Receivable, Modified [Line Items]
Loans modified	0
Current
Financing Receivable, Modified [Line Items]
Loans modified	4,041
30-89 Days Past Due
Financing Receivable, Modified [Line Items]
Loans modified	0
≥ 90 Days Past Due
Financing Receivable, Modified [Line Items]
Loans modified	0
Commercial real estate
Financing Receivable, Modified [Line Items]
Loans modified	0
Commercial real estate | Current
Financing Receivable, Modified [Line Items]
Loans modified	2,293
Commercial real estate | 30-89 Days Past Due
Financing Receivable, Modified [Line Items]
Loans modified	0
Commercial real estate | ≥ 90 Days Past Due
Financing Receivable, Modified [Line Items]
Loans modified	0
Commercial and industrial
Financing Receivable, Modified [Line Items]
Loans modified	0
Commercial and industrial | Current
Financing Receivable, Modified [Line Items]
Loans modified	1,748
Commercial and industrial | 30-89 Days Past Due
Financing Receivable, Modified [Line Items]
Loans modified	0
Commercial and industrial | ≥ 90 Days Past Due
Financing Receivable, Modified [Line Items]
Loans modified	0

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