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Goodwill And Intangible Assets (Estimated Amortization Of Intangible Assets) (Details) (USD $)
In Thousands, unless otherwise specified
Apr. 30, 2013
Goodwill And Intangible Assets [Abstract]  
2014 $ 1,538
2015 1,512
2016 1,096
2017 814
2018 774
Therafter 1,418
Finite-lived intangible assets, Net carrying amount $ 7,152