Fair Value Measurements Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - Estimate Fair Value [Member] - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Mar. 31, 2016	Mar. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments	$ 0	$ 1,373
Securitized beneficial interests	40,368	40,712
Total Assets	40,368	42,085
Guarantees	7,350	8,650
Derivative financial instruments	0	0
Total Liabilities	7,350	8,650
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments	0	1,373
Securitized beneficial interests	0	0
Total Assets	0	1,373
Guarantees	0	0
Derivative financial instruments	0	0
Total Liabilities	0	0
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments	0	0
Securitized beneficial interests	40,368	40,712
Total Assets	40,368	40,712
Guarantees	7,350	8,650
Derivative financial instruments	0	0
Total Liabilities	$ 7,350	$ 8,650