Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2012	Jan. 31, 2011	Jan. 31, 2010
Cash flows from operating activities
Net income	$ 49,620	$ 56,682	$ 31,718
Adjustments to reconcile net income to net cash provided by (used) in operating activities:
Depreciation and amortization	7,473	5,733	5,380
Equity based compensation	5,200	3,314	1,891
Tax benefit from exercise/vesting of equity awards	809
Deferred financing charges	425	844	591
Equity loss in joint venture	1,271
Deferred income taxes	3,568	6,125	(2,984)
Changes in operating assets and liabilities:
Accounts receivable, net	(24,169)	(64,885)	(3,761)
Inventories	(48,526)	(85,118)	(3,265)
Income taxes, net	6,171	(10,833)	5,652
Prepaid expenses and other current assets	(1,324)	(2,935)	(375)
Other assets, net	64	(1,055)	(456)
Accounts payable, accrued expenses and other liabilities	6,194	63,479	9,608
Net cash provided by (used in) operating activities	6,776	(28,649)	43,999
Cash flows from investing activities
Investment in equity of joint venture	(3,650)
Capital expenditures	(17,410)	(19,407)	(1,477)
Contingent purchase price paid			(5,541)
Net cash used in investing activities	(21,060)	(19,407)	(7,018)
Cash flows from financing activities
Proceeds from (repayment of) notes payable, net	30,050		(29,048)
Proceeds from sale of common stock, net			34,657
Proceeds from exercise of stock warrants		4,129
Proceeds from exercise of equity awards	619	2,786	1,188
Stock repurchase	(2,929)
Excess tax benefit from exercise/vesting of equity awards	1,136	4,356	859
Taxes paid for net share settlements			(296)
Net cash provided by financing activities	28,876	11,271	7,360
Effect of exchange rate changes	23	17	(36)
Net increase (decrease) in cash and cash equivalents	14,615	(36,768)	44,305
Cash and cash equivalents at beginning of year	10,045	46,813	2,508
Cash and cash equivalents at end of year	24,660	10,045	46,813
Cash paid during the year for:
Interest	5,228	4,145	5,002
Income taxes	$ 18,243	$ 36,548	$ 8,085