Commitments and Contingencies (Schedule Of Minimum Rental Requirements) (Details) $ in Thousands	Apr. 30, 2018 USD ($)
Commitments and Contingencies Disclosure [Abstract]
2018	$ 15,536
2019	15,416
2020	14,132
2021	9,321
2022	7,410
2023 (and thereafter)	32,026
Total, Operating	93,841
Capital Leases, Future Minimum Payments, Net Present Value [Abstract]
2018	2,138
2019	1,889
2020	1,422
2021	750
2022	662
2023 (and thereafter)	828
Total, Capital	7,689
Less amounts representing interest (2%)	(444)
Total obligations under capital leases	$ 7,245
Minimum [Member]
Capital Leased Assets [Line Items]
Capital leases, interest rate, effective percentage	2.00%
Maximum [Member]
Capital Leased Assets [Line Items]
Capital leases, interest rate, effective percentage	6.50%

Capital Leases of Lessee, Contingent Rentals, Interest Rate, Effective Percentage

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Amount of minimum lease payments for capital leases.

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Amount of minimum lease payments for capital leases due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of minimum lease payments for capital leases due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Present value of minimum lease payments for capital leases net of executory costs, including amounts paid by the lessee to the lessor for insurance, maintenance and taxes.

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Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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