Fair Value Measurements Input Hierarchy of Items Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2014
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments	$ 609	$ 1,373	$ 1,550
Securitized beneficial interests	0	0	0
Total Assets	609	1,373	1,550
Guarantees	0	0	0
Derivative financial instruments	0	0	0
Total liabilities	0	0	0
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments	0	0	0
Securitized beneficial interests	23,256	40,712	24,883
Total Assets	23,256	40,712	24,883
Guarantees	7,723	8,650	7,262
Derivative financial instruments	0	0	0
Total liabilities	7,723	8,650	7,262
Total Assets / Liabilities, at Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments	609	1,373	1,550
Securitized beneficial interests	23,256	40,712	24,883
Total Assets	23,865	42,085	26,433
Guarantees	7,723	8,650	7,262
Derivative financial instruments	0	0	0
Total liabilities	$ 7,723	$ 8,650	$ 7,262