Commitments and Contingencies (Schedule Of Minimum Rental Requirements) (Details) - Apr. 30, 2015 - USD ($) $ in Thousands	Total
Commitments and Contingencies Disclosure [Abstract]
2016	$ 3,108
2017	1,687
2018	777
2019	599
2020	314
2021 (and thereafter)	45
Total, Operating	6,530
Capital Leases, Future Minimum Payments, Net Present Value [Abstract]
2016	1,696
2017	1,576
2018	1,197
2019	803
2020	665
2021 (and thereafter)	2,813
Total, Capital	8,750
Less amounts representing interest (2%)	(775)
Total obligations under capital leases	$ 7,975
Capital leases, interest rate, effective percentage	2.00%