Commitments And Contingencies (Schedule Of Minimum Rental Requirements) (Details) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2014
Commitments And Contingencies [Abstract]
2015	$ 3,257
2016	2,878
2017	1,489
2018	584
2019	395
2020 (and thereafter)	254
Total, Operating	8,857
Capital Leases, Future Minimum Payments, Net Present Value [Abstract]
2015	1,377
2016	1,366
2017	1,246
2018	871
2019	666
2020 (and thereafter)	3,477
Total, Capital	9,003
Less amounts representing interest (2%)	(884)
Total obligations under capital leases	$ 8,119