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Variable Interest Entity (Tables)
9 Months Ended
Jan. 31, 2013
Variable Interest Entity [Abstract]  
Schedule of total assets, the maximum exposure to loss, value of the assets and liabilities in EAM
 
Value Line
($ in thousands)
VIE Assets
Investment in
EAM Trust (1)
Liabilities
Maximum
Exposure to
Loss
As of January 31, 2013 (unaudited)
$ 59,141 $ 57,465 $ - $ 57,465
As of April 30, 2012
$ 57,482 $ 56,331 $ - $ 56,331
 
(1) Reported within Long Term Assets on the Consolidated Condensed Balance Sheets.