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Allowance for Credit Losses (Narratives) (Details) $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2024 USD ($) Segment | Mar. 31, 2024 USD ($)
Financing Receivable Impaired [Line Items] |  |
Trade receivable components | Segment | 2 |
Percentage of estimated gain loss |  | 5.00%
Paid and unpaid percentage | 1.00% |
Allowance for expected credit losses | $ 6.2 | $ 6.2
Available for sale securities, accrued interest receivable | 29.7 | 29.3
Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Premiums Receivable Gross | $ 4.3 | $ 0.1
Credit card receivables |  |
Financing Receivable Impaired [Line Items] |  |
Average Historical Chargeback Term | For credit card receivables, the Company uses a trailing 13-month average historical chargeback percentage of total credit card receivables to estimate a credit loss reserve. 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. |

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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 49 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-49 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-18 + Details
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