Allowance for Credit Losses (Narratives) (Details) $ in Millions	9 Months Ended
	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)
Receivables [Abstract]
Trade receivable components	2
Allowance for expected credit losses	$ 4.3
Available for sale securities, accrued interest receivable		$ 29.7
Financing Receivable Allowance For Credit Loss Additional Information [Abstract]
Reinsurance paid percentage of total assets	1.00%
Premiums Receivable Gross	$ 2.0
Credit card receivables
Receivables [Abstract]
Average Historical Chargeback Term	For credit card receivable, the Company uses a trailing 13 months average historical chargeback percentage of total credit card receivable. The Company rents equipment to corporate customers in which payment terms are 30 days.
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable Allowance For Credit Loss Additional Information [Abstract]
Modeling of mortgage loans	Loans that management has the intent and ability to hold for the foreseeable future, or until maturity or payoff, are reported at amortized cost.   Modeling for the Company‘s mortgage loans is based on inputs most highly correlated to defaults, including loan-to-value, occupancy, and payment history.   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.   These loans are evaluated on an individual basis and loan specific risk characteristics such as occupancy levels, expense, income growth and other relevant available information from internal and external sources relating to past events, current conditions, and reasonable and supportable forecasts.