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Nonrecourse Debt - Schedule of Minimum Maturities of Nonrecourse Debt (Detail)

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Nonrecourse Debt - Schedule of Minimum Maturities of Nonrecourse Debt (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Debt Instrument [Line Items]  
Maturity of Nonrecourse debt, 2015 $ 42,362
Maturity of Nonrecourse debt, 2016 41,383
Maturity of Nonrecourse debt, 2017 23,544
Maturity of Nonrecourse debt, 2018 19,830
Maturity of Nonrecourse debt, 2019 9,963
Maturity of Nonrecourse debt, Thereafter 112,366
Maturity of Nonrecourse debt, Total 249,448
Asset-Backed Nonrecourse Notes [Member]
 
Debt Instrument [Line Items]  
Maturity of Nonrecourse debt, 2015 8,633
Maturity of Nonrecourse debt, 2016 7,808
Maturity of Nonrecourse debt, 2017 8,146
Maturity of Nonrecourse debt, 2018 7,689
Maturity of Nonrecourse debt, 2019 4,313
Maturity of Nonrecourse debt, Thereafter 62,153
Maturity of Nonrecourse debt, Total 98,742
Other Nonrecourse Debt [Member]
 
Debt Instrument [Line Items]  
Maturity of Nonrecourse debt, 2015 33,729
Maturity of Nonrecourse debt, 2016 33,575
Maturity of Nonrecourse debt, 2017 15,398
Maturity of Nonrecourse debt, 2018 12,141
Maturity of Nonrecourse debt, 2019 5,650
Maturity of Nonrecourse debt, Thereafter 50,213
Maturity of Nonrecourse debt, Total $ 150,706