CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 28, 2012	Apr. 30, 2011
Statement of Cash Flows [Abstract]
Net income/(loss)	$ 17,772	$ 26,038
Adjustments to reconcile net income/(loss) to net cash provided/(used) by operating activities [Abstract]
Depreciation and amortization	14,447	15,099
Stock-based compensation	1,351	1,031
Accretion of discount on 1.125% Senior Convertible Notes	1,827	1,700
Deferred income taxes	813	886
Write-down of capital assets due to restructuring	0	558
Net (gain)/loss from disposition of capital assets	69	(5,157)
Changes in operating assets and liabilities [Abstract]
Accounts receivable, net	27,803	26,390
Merchandise inventories	(20,890)	(22,467)
Accounts payable	23,187	29,901
Prepayments and other	3,550	(4,280)
Accrued expenses and other	(9,676)	(2,355)
Net cash provided/(used) by operating activities	60,253	67,344
Net cash used by investing activities
Investment in capital assets	(13,128)	(8,888)
Proceeds from sales of capital assets	0	7,521
(Increase)/decrease in other assets	(24)	(594)
Net cash used by investing activities	(13,152)	(1,961)
Net cash used by financing activities [Abstract]
Repayments of long-term borrowings	(1,389)	(1,611)
Issuance of common stock under employee stock plans, net of amounts withheld for payroll taxes	(233)	(851)
Net cash used by financing activities	(1,622)	(2,462)
Increase/(decrease) in cash and cash equivalents	45,479	62,921
Cash and cash equivalents, beginning of period	168,607	117,482
Cash and cash equivalents, end of period	$ 214,086	$ 180,403