Income Taxes - Uncertainty in Income Taxes - Narrative (Detail) - USD ($)	Aug. 02, 2015	May. 03, 2015	Aug. 03, 2014
Income Taxes [Line Items]
Unrecognized tax benefits	$ 14,200,000	$ 14,100,000	$ 14,000,000
Unrecognized tax benefits that would favorably impact effective income tax rate if recognized	3,600,000	3,800,000	4,000,000
Expected increase in unrecognized tax benefits related to double taxation under applicable tax treaties with foreign tax jurisdictions	867,000
Net Non-current Deferred Income Taxes [Member]
Income Taxes [Line Items]
Unrecognized tax benefits	10,600,000	10,300,000	10,000,000
Income Taxes Payable - Long-Term [Member]
Income Taxes [Line Items]
Unrecognized tax benefits	$ 3,600,000	$ 3,800,000	$ 4,000,000

Income Taxes [Line Items]

No definition available.

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- Definition

The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

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- Definition

Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15A

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

-URI http://asc.fasb.org/extlink&oid=6527854

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- Definition

The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

+ References

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