Borrowing Arrangements - Additional Information (Detail) - USD ($)	12 Months Ended
Jan. 31, 2016	Feb. 01, 2015
Debt Instrument [Line Items]
Additional percentage over reference rate	2.00%
Interest rate description	Interest on unreimbursed amounts under the letter of credit facilities accrues at the lender's prime rate (or, if greater, the average rate on overnight federal funds plus one-half of one percent) plus 2.0%.
Amount outstanding under credit facility	$ 0	$ 0
Amount of borrowings under credit facility during period	200,000,000	$ 90,000,000
Maximum borrowing capacity under letter of credit facilities including additional borrowing capacity	$ 70,000,000
Letter of credit facilities, maturity date	Aug. 27, 2016
Outstanding letter of credit facilities	$ 6,088,000
Latest expiration date possible for future letters of credit	Jan. 24, 2017
Standby Letters of Credit
Debt Instrument [Line Items]
Amount issued but undrawn under credit facility	$ 13,367,000
Federal Funds
Debt Instrument [Line Items]
Additional percentage over reference rate	0.50%
Unsecured Revolving Line Of Credit
Debt Instrument [Line Items]
Current borrowing capacity	$ 500,000,000
Maximum borrowing capacity including additional borrowing capacity	$ 750,000,000
Credit facility, maturity date	Nov. 19, 2019
Interest rate description	We may elect interest rates calculated at (i) Bank of America's prime rate (or, if greater, the average rate on overnight federal funds plus one-half of one percent, or a rate based on LIBOR plus one percent) plus a margin based on our leverage ratio or (ii) LIBOR plus a margin based on our leverage ratio.
Weighted average interest rate	1.11%	1.05%
Unsecured Revolving Line Of Credit \| Maximum
Debt Instrument [Line Items]
Additional borrowing capacity	$ 250,000,000
Unsecured Revolving Line Of Credit \| Federal Funds
Debt Instrument [Line Items]
Additional percentage over reference rate	0.50%
Unsecured Revolving Line Of Credit \| Libor
Debt Instrument [Line Items]
Additional percentage over reference rate	1.00%

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

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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

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19, 20, 22
-Article 5

+ Details

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- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

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 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Period Type:	instant

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

+ Details

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- Definition

Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions).

+ References

+ Details

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- Definition

Maximum amount borrowed under the credit facility at any time during the period.

+ References

No definition available.

+ Details

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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- Definition

Weighted average interest rate of short-term debt outstanding.

+ References

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 210.5-02.19(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Reflects when the letter of credit facilities terminates, which may be presented in a variety of ways (year, month and year, day, month and year, quarter).

+ References

No definition available.

+ Details

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- Definition

Maximum borrowing capacity under the letter of credit facilities without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facilities.

+ References

No definition available.

+ Details

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- Definition

Expiration date for future letters of credit issued under the letter of credit facilities.

+ References

No definition available.

+ Details

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- Definition

Additional borrowing capacity that may be requested upon notice to the lenders.

+ References

No definition available.

+ Details

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- Definition

Amount available to be drawn upon by standby letter of credit beneficiaries under the credit facility as of the balance sheet date.

+ References

No definition available.

+ Details

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