Fair Value Measurements Reconciliation of Change in Recurring Level 3 Balances (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Mar. 31, 2013
Securitized Beneficial Interests [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Ending Balance	$ 21,349
Fair value, assets measured on recurring basis, change in unrealized gain (loss) included in other income	496	516	1,538
Fair Value, Measurements, Recurring [Member] | Securitized Beneficial Interests [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	31,992	25,864	25,864
Issuance of guarantees/sales of receivables	42,141	56,338
Settlements	(52,816)	(46,280)
Losses recognized in earnings	32	(554)
Ending Balance	21,349	35,368
Fair Value, Measurements, Recurring [Member] | Guarantees [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	6,367	5,265	5,265
Issuance of guarantees/sales of receivables	3,867	3,892
Settlements	(4,058)	(3,354)
Losses recognized in earnings	0	0
Ending Balance	$ 6,176	$ 5,803