Off-Balance Sheet Finance Receivable Securitization Transactions (Other-Than-Temporary Impairments On Investment In Retained Interests) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Dec. 31, 2009
Securities Financing Transaction [Line Items]
Clean-up call repurchase option, interest rate	10.00%
Credit [Member]
Securities Financing Transaction [Line Items]
Balance, beginning of period	$ 29,686
Credit component recognized in earnings during the period	28,240
Reductions due to sale/repurchase	(954)	[1]
Balance, end of period	$ 56,972

[1] The Company exercised its 10% clean up call repurchase option for certain securitization trusts.