Loans and Leases Held for Investment and Credit Quality - Schedule of Aging Analysis Of Loans That Were Modified (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Mar. 31, 2024
Financing Receivable Modifications [Line Items]
Total	$ 2,243	$ 0
Current
Financing Receivable Modifications [Line Items]
Total	35,220	32,977
30-89 Days Past Due
Financing Receivable Modifications [Line Items]
Total	0	0
90 Days or More Past Due
Financing Receivable Modifications [Line Items]
Total	2,243	0
Small Business Banking
Financing Receivable Modifications [Line Items]
Total	2,243	0
Small Business Banking \| Current
Financing Receivable Modifications [Line Items]
Total	17,644	15,286
Small Business Banking \| 30-89 Days Past Due
Financing Receivable Modifications [Line Items]
Total	0	0
Small Business Banking \| 90 Days or More Past Due
Financing Receivable Modifications [Line Items]
Total	2,243	0
Commercial Banking
Financing Receivable Modifications [Line Items]
Total	0	0
Commercial Banking \| Current
Financing Receivable Modifications [Line Items]
Total	17,576	17,691
Commercial Banking \| 30-89 Days Past Due
Financing Receivable Modifications [Line Items]
Total	0	0
Commercial Banking \| 90 Days or More Past Due
Financing Receivable Modifications [Line Items]
Total	$ 0	$ 0