Nature of business and summary of significant accounting policies (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 01, 2014 segment	Mar. 02, 2013	Feb. 25, 2012
Gift cards and merchandise credits
Period of estimated performance	48 months
Gift card breakage recorded	$ 896	$ 695	$ 675
Advertising
Catalog and direct mailings costs capitalized	1,518	628
Advertising expense incurred	33,786	32,655	27,091
Management fee
Management fee paid to majority shareholder, LGP	667	1,000	500
Income taxes
Uncertain tax positions requiring accrual	0	0
Accounts receivable
Allowances for doubtful accounts	321	266
Property and equipment ,net:
Cost capitalized in connection with the development of internally used software	3,104	3,252	2,597
Cost amortized in connection with the development of internally used software	$ 2,761	$ 2,210	$ 1,743
Foreign currency forward contracts
Minimum term period of currency-related hedge instruments	1 month
Maximum term period of currency-related hedge instruments	12 months
Intangibles
Number of reporting units	2
Buildings
Property and equipment ,net:
Estimated useful lives	30 years
Furniture, fixtures, and equipment | Minimum
Property and equipment ,net:
Estimated useful lives	3 years
Furniture, fixtures, and equipment | Maximum
Property and equipment ,net:
Estimated useful lives	10 years
Computer software | Minimum
Property and equipment ,net:
Estimated useful lives	2 years
Computer software | Maximum
Property and equipment ,net:
Estimated useful lives	5 years