Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jan. 31, 2012	Jan. 31, 2011	Jan. 31, 2010
Consolidated Statements of Income [Abstract]
Net sales	$ 1,231,201	$ 1,063,404	$ 800,864
Cost of goods sold	860,485	712,359	533,996
Gross profit	370,716	351,045	266,868
Selling, general and administrative expenses	277,019	248,380	205,281
Depreciation and amortization	7,473	5,733	5,380
Operating profit	86,224	96,932	56,207
Equity loss in joint venture	1,271
Interest and financing charges, net	5,713	4,027	4,705
Income before income taxes	79,240	92,905	51,502
Income tax expense	29,620	36,223	19,784
Net income	$ 49,620	$ 56,682	$ 31,718
Basic:
Net income per common share	$ 2.51	$ 2.96	$ 1.87
Weighted average number of shares outstanding	19,796	19,175	16,990
Diluted:
Net income per common share	$ 2.46	$ 2.88	$ 1.83
Weighted average number of shares outstanding	20,192	19,705	17,358