Financing Arrangements Future minimum lease payments under non-cancelable operating leases (Details) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2013
Financing Arrangements [Abstract]
Minimum Lease Payments, 2013	$ 1,478
Minimum Lease Payments, 2014	1,266
Minimum Lease Payments, 2015	1,053
Minimum Lease Payments, 2016	202
Minimum Lease Payments, 2017	121
Minimum Lease Payments, Thereafter	$ 0

Amount of required minimum rental payments maturing in the next fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments maturing in the fifth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments maturing in the forth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments maturing in the third fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments maturing in the second fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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- Definition

Amount of required minimum rental payments maturing after the fifth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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