Allowance for Credit Losses (Narratives) (Details) - USD ($) $ in Millions |
6 Months Ended | |
|---|---|---|
Sep. 30, 2025 |
Mar. 31, 2025 |
|
| Financing Receivable Impaired [Line Items] | ||
| Paid and unpaid percentage | 1.00% | |
| Available for sale securities, accrued interest receivable | $ 29.1 | $ 29.4 |
| Commercial Real Estate Portfolio Segment [Member] | ||
| Financing Receivable Impaired [Line Items] | ||
| Premiums Receivable Gross | $ 1.0 | $ 0.1 |
| Credit card receivables | ||
| Financing Receivable Impaired [Line Items] | ||
| Average Historical Chargeback Term | The Company rents equipment to corporate customers for which payment terms are 30 days. | |
| Accrued interest receivables | ||
| Financing Receivable Impaired [Line Items] | ||
| Average Historical Chargeback Term | Historical credit loss experience provides additional support for the estimation of expected credit losses. In assessing the credit losses, the portfolio is reviewed on a collective basis, using loan-specific cash flows to determine the fair value of the collateral in the event of default. Adjustments to this analysis are made to assess loans with a loan-to-value of 65% or greater. |