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Property, Plant and Equipment - Depreciation and Amortization of Property and Equipment (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Property, Plant and Equipment [Abstract]
Depreciation and amortization expense	$ 17,915	$ 9,908	$ 6,928

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

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