Fair Value Measurements Input Hierarchy of Items Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments	$ 0	$ 1,373	$ 409
Securitized beneficial interests	0	0	0
Total Assets	0	1,373	409
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	20,796	40,712	27,221
Total Assets	20,796	40,712	27,221
Guarantees	5,852	8,650	8,507
Derivative financial instruments	0	0	0
Total liabilities	5,852	8,650	8,507
Total Assets / Liabilities, at Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments	0	1,373	409
Securitized beneficial interests	20,796	40,712	27,221
Total Assets	20,796	42,085	27,630
Guarantees	5,852	8,650	8,507
Derivative financial instruments	0	0	0
Total liabilities	$ 5,852	$ 8,650	$ 8,507