Schedule of Valuation and Qualifying Accounts and Reserves (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2015		Jan. 31, 2014		Jan. 31, 2013
Accounts Receivable: Allowance for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Balance at beginning of period	$ 1,860		$ 2,080		$ 2,466
Valuation Allowances and Reserves, Charged to Cost and Expense	1,859		2,256		1,346
Valuation Allowances and Reserves, Charged to Other Accounts	0		0		0
Valuation Allowances and Reserves, Deductions	1,951	[1]	2,476	[1]	1,732	[1]
Valuation Allowances and Reserves, Balance at end of period	1,768		1,860		2,080
Accounts Receivable: Allowance for Sales Returns [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Balance at beginning of period	8,477		7,630		9,306
Valuation Allowances and Reserves, Charged to Cost and Expense	1,880		2,477		3,367
Valuation Allowances and Reserves, Charged to Other Accounts	0		0		0
Valuation Allowances and Reserves, Deductions	1,526	[2]	1,630	[2]	5,043	[2]
Valuation Allowances and Reserves, Balance at end of period	8,831		8,477		7,630
Allowance for inventory liquidation and obsolescence [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Balance at beginning of period	64,113		54,175		53,938
Valuation Allowances and Reserves, Charged to Cost and Expense	33,620		31,667		32,228
Valuation Allowances and Reserves, Charged to Other Accounts	0		0		0
Valuation Allowances and Reserves, Deductions	34,485	[3]	21,729	[3]	31,991	[3]
Valuation Allowances and Reserves, Balance at end of period	63,248		64,113		54,175
Allowance for inventory shrinkage [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Balance at beginning of period	1,458		1,232		1,495
Valuation Allowances and Reserves, Charged to Cost and Expense	2,633		3,062		2,600
Valuation Allowances and Reserves, Charged to Other Accounts	0		0		0
Valuation Allowances and Reserves, Deductions	1,904	[4]	2,836	[4]	2,863	[4]
Valuation Allowances and Reserves, Balance at end of period	2,187		1,458		1,232
Deferred Tax Valuation Allowance [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Balance at beginning of period	17,693		14,181		13,570
Valuation Allowances and Reserves, Charged to Cost and Expense	4,023		5,630		6,786
Valuation Allowances and Reserves, Charged to Other Accounts	0		0		0
Valuation Allowances and Reserves, Deductions	5,484	[5]	2,118	[5]	6,175	[5]
Valuation Allowances and Reserves, Balance at end of period	$ 16,232		$ 17,693		$ 14,181

[1] Uncollectible accounts written off.

[2] Adjustment related to sales returns previously provided for.

[3] Liquidation of inventory previously written down to market.

[4] Physical inventory losses.

[5] Reversal of deferred tax valuation allowance and utilization of deferred tax loss carryforward.