Loans and Allowance for Credit Losses on Loans - Schedule of Age Analysis of Gross Modified Loans Held for Investment (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Mar. 31, 2025
Financing Receivable, Modifications [Line Items]
Total	$ 93,049	$ 90,886
30-89 Days Past Due
Financing Receivable, Modifications [Line Items]
Total	0	0
90+ Days Past Due
Financing Receivable, Modifications [Line Items]
Total	0	0
Non-Accrual
Financing Receivable, Modifications [Line Items]
Total	75,910	41,230
Current
Financing Receivable, Modifications [Line Items]
Total	17,139	49,656
Commercial
Financing Receivable, Modifications [Line Items]
Total	76,154	43,392
Commercial \| 30-89 Days Past Due
Financing Receivable, Modifications [Line Items]
Total	0	0
Commercial \| 90+ Days Past Due
Financing Receivable, Modifications [Line Items]
Total	0	0
Commercial \| Non-Accrual
Financing Receivable, Modifications [Line Items]
Total	59,015	9,567
Commercial \| Current
Financing Receivable, Modifications [Line Items]
Total	17,139	33,825
Commercial real estate
Financing Receivable, Modifications [Line Items]
Total	16,895	47,494
Commercial real estate \| 30-89 Days Past Due
Financing Receivable, Modifications [Line Items]
Total	0	0
Commercial real estate \| 90+ Days Past Due
Financing Receivable, Modifications [Line Items]
Total	0	0
Commercial real estate \| Non-Accrual
Financing Receivable, Modifications [Line Items]
Total	16,895	31,663
Commercial real estate \| Current
Financing Receivable, Modifications [Line Items]
Total	$ 0	$ 15,831