Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	Jan. 28, 2012		Jan. 29, 2011		Jan. 30, 2010
Cash flows from operating activities:
Net income	$ 97,491,000		$ 85,799,000		$ 71,155,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	26,101,000		24,479,000		22,382,000
Loss on disposals of property, plant and equipment	311,000		357,000		160,000
Asset impairment charges	300,000		1,200,000		1,600,000
Non-cash equity compensation	2,547,000		1,252,000		0
Increase (decrease) in deferred taxes	11,029,000		2,751,000		(2,537,000)
Changes in assets and liabilities:
(Increase) decrease in accounts receivable	(6,381,000)		(3,665,000)		1,544,000
(Increase) in inventories	(71,345,000)		(14,989,000)		(9,079,000)
(Increase) decrease in prepaids and other current assets	(1,392,000)		(3,459,000)		1,741,000
Decrease in non-current assets	46,000		83,000		61,000
Increase (decrease) in accounts payable	35,159,000		13,280,000		(11,549,000)
Increase (decrease) in accrued expenses	(77,000)		1,738,000		12,120,000
(Decrease) in deferred rent	(1,679,000)		(2,574,000)		(2,890,000)
Increase (decrease) in other noncurrent liabilities	(288,000)		(28,000)		86,000
Net cash provided by operating activities	91,816,000		106,239,000		84,748,000
Cash flows used in investing activities:
Payments for capital expenditures	(37,531,000)	[1]	(29,352,000)	[1]	(16,333,000)	[1]
Proceeds from maturities of short-term investments	393,424,000		169,736,000		34,951,000
Payments to acquire short-term investments	(443,887,000)		(189,789,000)		(204,687,000)
Net cash (used in) investing activities	(87,994,000)		(49,405,000)		(186,069,000)
Cash flows from financing activities:
Income tax benefit from stock compensation plans	1,883,000		1,300,000		65,000
Proceeds from issuance of common stock	546,000		1,013,000		234,000
Fractional share payments	0		(21,000)		0
Net cash provided by financing activities	2,429,000		2,292,000		299,000
Net increase (decrease) in cash and cash equivalents	6,251,000		59,126,000		(101,022,000)
Cash and cash equivalents, beginning of year	80,979,000		21,853,000		122,875,000
Cash and cash equivalents, end of year	$ 87,230,000		$ 80,979,000		$ 21,853,000

[1] Capital expenditures include payments for property, plant and equipment made for the reportable segment.