Fair Value Measurements Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - Estimate of Fair Value [Member] - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Mar. 31, 2015	Mar. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments	$ 1,373	$ 0
Securitized beneficial interests	40,712	35,559
Total Assets	42,085	35,559
Guarantees	8,650	7,344
Derivative financial instruments	0	169
Total Liabilities	8,650	7,513
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments	1,373	0
Securitized beneficial interests	0	0
Total Assets	1,373	0
Guarantees	0	0
Derivative financial instruments	0	169
Total Liabilities	0	169
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments	0	0
Securitized beneficial interests	40,712	35,559
Total Assets	40,712	35,559
Guarantees	8,650	7,344
Derivative financial instruments	0	0
Total Liabilities	$ 8,650	$ 7,344