Schedule of Future Minimum Rental Payments for Operating Leases Having Non-Cancelable Lease Periods in Excess of One Year (Detail) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2014
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2015	$ 58,213
2016	51,620
2017	43,080
2018	35,012
2019	29,179
Thereafter	103,745
Future minimum rental payments for operating leases, total	$ 320,849

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 55

-Paragraph 40

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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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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