Stock-Based Compensation - Summary of the Activity for Performance Unit Awards (Details) (Performance unit awards, USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011	Jan. 31, 2010
Units
Beginning balance (in shares)	360	556	593
Performance units granted (in shares)	144	117	143
Performance units vested (in shares)	(144)	(218)	0
Performance units cancelled/forfeited (in shares)	(7)	(95)	(180)
Ending balance (in shares)	353	360	556	593
Weighted Average Grant Date Fair Value (per share)
Beginning balance (in dollars per share)	$ 16.65	$ 14.26	$ 14.29
Performance units granted (in dollars per share)	$ 29.30	$ 23.33	$ 16.68
Performance units vested (in dollars per share)	$ 11.92	$ 14.74	$ 0.00
Performance units forfeited (in dollars per share)	$ 29.35	$ 15.26	$ 16.28
Ending balance (in dollars per share)	$ 23.50	$ 16.65	$ 14.26	$ 14.29
Aggregate Unrecognized Compensation
Beginning balance	$ 4,829	$ 7,971	$ 580
Ending balance	4,754	4,829	7,971	580
Weighted Average Period Over Which Expected to be Recognized (in years)
Ending Balance	1 year 1 month 6 days	1 year	1 year	1 year 3 months 18 days
Subject to Share Settlement
Units
Beginning balance (in shares)	180	326	363
Performance units granted (in shares)	77	59	72
Performance units vested (in shares)	(72)	(157)	0
Performance units cancelled/forfeited (in shares)	(4)	(48)	(109)
Ending balance (in shares)	181	180	326
Subject to Cash Settlement
Units
Beginning balance (in shares)	180	230	230
Performance units granted (in shares)	67	58	71
Performance units vested (in shares)	(72)	(61)	0
Performance units cancelled/forfeited (in shares)	(3)	(47)	(71)
Ending balance (in shares)	172	180	230
Recorded Liability
Beginning balance	6,034	3,925	259
Performance units vested	(4,172)	(1,335)	0
Change in liability	2,560	3,444	3,666
Ending balance	$ 4,422	$ 6,034	$ 3,925

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Aggregate carrying value as of the balance sheet date of the liabilities for stock option plans and other equity-based compensation arrangements.

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As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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