Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	May 02, 2015	Jan. 31, 2015	May 03, 2014
Assets [Abstract]:
Cash and equivalents	$ 206,868	$ 59,171	$ 132,900
Short-term investments	128,705us-gaap_ShortTermInvestments	171,201us-gaap_ShortTermInvestments	179,877us-gaap_ShortTermInvestments
Accounts receivable, net	24,125us-gaap_AccountsReceivableNetCurrent	24,400us-gaap_AccountsReceivableNetCurrent	22,762us-gaap_AccountsReceivableNetCurrent
Accounts receivable from related parties	56us-gaap_DueFromRelatedPartiesCurrent	7us-gaap_DueFromRelatedPartiesCurrent	14us-gaap_DueFromRelatedPartiesCurrent
Inventories	512,096us-gaap_InventoryNet	450,836us-gaap_InventoryNet	419,983us-gaap_InventoryNet
Prepaid expenses and other current assets	45,919	43,108	44,404
Prepaid rent to related parties	875us-gaap_PrepaidRent	0us-gaap_PrepaidRent	973us-gaap_PrepaidRent
Deferred income taxes	21,858us-gaap_DeferredTaxAssetsNetCurrent	19,747us-gaap_DeferredTaxAssetsNetCurrent	20,394us-gaap_DeferredTaxAssetsNetCurrent
Total current assets	940,502us-gaap_AssetsCurrent	768,470us-gaap_AssetsCurrent	821,307us-gaap_AssetsCurrent
Property and equipment, net	346,912us-gaap_PropertyPlantAndEquipmentNet	337,903us-gaap_PropertyPlantAndEquipmentNet	327,560us-gaap_PropertyPlantAndEquipmentNet
Long-term investments	120,724us-gaap_LongTermInvestments	216,756us-gaap_LongTermInvestments	235,411us-gaap_LongTermInvestments
Goodwill	25,899us-gaap_Goodwill	25,899us-gaap_Goodwill	25,899us-gaap_Goodwill
Deferred income taxes	9,588us-gaap_DeferredTaxAssetsNetNoncurrent	11,332us-gaap_DeferredTaxAssetsNetNoncurrent	11,598us-gaap_DeferredTaxAssetsNetNoncurrent
Prepaid Expense, Noncurrent	830us-gaap_PrepaidExpenseNoncurrent	794us-gaap_PrepaidExpenseNoncurrent	686us-gaap_PrepaidExpenseNoncurrent
Equity Method Investments	22,952us-gaap_EquityMethodInvestments	25,887us-gaap_EquityMethodInvestments	0us-gaap_EquityMethodInvestments
Notes Receivable, Related Parties, Noncurrent	46,686	43,304	0
Other assets	7,867us-gaap_OtherAssetsNoncurrent	7,898us-gaap_OtherAssetsNoncurrent	8,884us-gaap_OtherAssetsNoncurrent
Total assets	1,521,960us-gaap_Assets	1,438,243us-gaap_Assets	1,431,345us-gaap_Assets
Liabilities and Shareholders' equity [Abstract]:
Accounts payable	194,749us-gaap_AccountsPayableCurrent	169,518us-gaap_AccountsPayableCurrent	148,491us-gaap_AccountsPayableCurrent
Accounts payable to related parties	657us-gaap_DueToRelatedPartiesCurrent	1,092us-gaap_DueToRelatedPartiesCurrent	1,670us-gaap_DueToRelatedPartiesCurrent
Accrued expenses	136,374us-gaap_AccruedLiabilitiesCurrent	113,180us-gaap_AccruedLiabilitiesCurrent	120,483us-gaap_AccruedLiabilitiesCurrent
Total current liabilities	331,780us-gaap_LiabilitiesCurrent	283,790us-gaap_LiabilitiesCurrent	270,644us-gaap_LiabilitiesCurrent
Non-current liabilities	141,393us-gaap_OtherLiabilitiesNoncurrent	143,333us-gaap_OtherLiabilitiesNoncurrent	137,413us-gaap_OtherLiabilitiesNoncurrent
Commitments and Contingencies	0us-gaap_CommitmentsAndContingencies	0us-gaap_CommitmentsAndContingencies	0us-gaap_CommitmentsAndContingencies
Shareholders’ equity [Abstract]:
Additional Paid in Capital, Common Stock	915,134	908,679	893,778
Preferred Shares, no par value; 100,000 authorized; no shares issued or outstanding	0us-gaap_PreferredStockValue	0us-gaap_PreferredStockValue	0us-gaap_PreferredStockValue
Treasury Stock, Value	(86,938)us-gaap_TreasuryStockValue	(86,938)us-gaap_TreasuryStockValue	(1,600)us-gaap_TreasuryStockValue
Retained earnings	250,585	220,826	156,103
Basis difference related to acquisition of commonly controlled entity	(24,993)us-gaap_OtherAdditionalCapital	(24,993)us-gaap_OtherAdditionalCapital	(24,993)us-gaap_OtherAdditionalCapital
Accumulated other comprehensive loss	(5,001)	(6,454)	0
Total shareholders’ equity	1,048,787	1,011,120	1,023,288
Total liabilities and shareholders’ equity	1,521,960	1,438,243	1,431,345
Additional Paid-in Capital [Member]
Shareholders’ equity [Abstract]:
Total shareholders’ equity	915,134	908,679	893,778
Accumulated other comprehensive loss
Shareholders’ equity [Abstract]:
Total shareholders’ equity	$ (5,001)	$ (6,454)	$ 0

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