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Debt Obligations (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Mar. 31, 2012
Debt Obligations    
Securitized financing 2005-1 $ 43,661 $ 44,726
Securitized financing 2007-1 45,761 46,749
Construction lending lines 2,536 4,550
Total debt obligations $ 91,958 $ 96,025