Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 28, 2012	Apr. 30, 2011
Cash Flows From Operating Activities:
Net income	$ 53,645	$ 45,918
Adjustments to reconcile net income to net cash provided by operating activities -
Depreciation and amortization	26,092	24,188
Deferred tax benefit	(2,014)	(1,375)
Stock-based compensation expense	5,318	3,636
Excess tax benefit from stock-based compensation	(3,136)	(762)
Deferred rent and lease credits	(4,027)	(4,330)
Loss on disposal and impairment of property and equipment	1,285	1,434
(Increase) decrease in assets -
Inventories	(19,206)	(38,730)
Prepaid expenses and other assets	3,284	3,459
Increase in liabilities -
Accounts payable	38,726	14,404
Accrued and other deferred liabilities	36,845	29,119
Total adjustments	83,167	31,043
Net cash provided by operating activities	136,812	76,961
Cash Flows From Investing Activities:
(Increase) decrease in marketable securities	(4,633)	91,349
Purchases of property and equipment	(40,942)	(16,208)
Net cash (used in) provided by investing activities	(45,575)	75,141
Cash Flows From Financing Activities:
Proceeds from issuance of common stock	5,815	1,373
Excess tax benefit from stock-based compensation	3,136	762
Dividends paid	(8,753)	(8,835)
Repurchase of common stock	(3,277)	(36,688)
Net cash used in financing activities	(3,079)	(43,388)
Net increase in cash and cash equivalents	88,158	108,714
Cash and Cash Equivalents, Beginning of period	58,919	14,695
Cash and Cash Equivalents, End of period	147,077	123,409
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	86	69
Cash paid for income taxes, net	$ 890	$ 576