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Debt Obligations (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Mar. 31, 2012
Debt Obligations    
Securitized financing 2005-1 $ 42,179 $ 44,726
Securitized financing 2007-1 44,543 46,749
Construction lending lines 1,041 4,550
Total debt obligations $ 87,763 $ 96,025