Long-Term Debt, Exclusive of Current Installments (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended
Apr. 30, 2016	Jan. 30, 2016	May. 02, 2015
6.95% Ten-Year Notes
Debt Instrument [Line Items]
Debt instrument, interest rate	6.95%
Maturity date	Apr. 15, 2019
Unamortized debt discount	$ 205	$ 223	$ 276
Effective interest rate	6.98%
2.50% Ten-Year Notes
Debt Instrument [Line Items]
Debt instrument, interest rate	2.50%
Maturity date	May 15, 2023
Unamortized debt discount	$ 312	323	356
Effective interest rate	2.51%
2.75% Seven-Year Notes
Debt Instrument [Line Items]
Debt instrument, interest rate	2.75%
Maturity date	Jun. 15, 2021
Unamortized debt discount	$ 381	$ 400	$ 456
Effective interest rate	2.76%

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

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- Definition

The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

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