Fair Value Measurements Textuals (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Mar. 31, 2015
Securitized Beneficial Interests [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Fair value, assets measured on recurring basis, change in unrealized gain (loss) included in other income	$ 568	$ 1,369	$ 2,034
Securitized Beneficial Interests [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Sensitivity analysis of fair value, transferor's interests in transferred financial assets, impact of 10 percent adverse change in other assumption	55
Sensitivity analysis of fair value, transferor's interests in transferred financial assets, impact of 20 percent adverse change in other assumption	110
Guarantees [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Sensitivity analysis of fair value, transferor's interests in transferred financial assets, impact of 10 percent adverse change in other assumption	360
Sensitivity analysis of fair value, transferor's interests in transferred financial assets, impact of 20 percent adverse change in other assumption	709
Guarantees of Unconsolidated Subsidiary [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Sensitivity analysis of fair value, transferor's interests in transferred financial assets, impact of 10 percent adverse change in other assumption	482
Sensitivity analysis of fair value, transferor's interests in transferred financial assets, impact of 20 percent adverse change in other assumption	$ 955