Significant Accounting Policies - Allowances Against Accounts Receivable (Details) - USD ($) $ in Thousands	Jan. 29, 2017	Jan. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	$ (8,230)	$ (7,793)
Allowance for Doubtful Accounts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	(2,696)	(889)
Sales Rebates Allowance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	(2,571)	(5,006)
Sales Returns Allowance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	(1,795)	(517)
Other Allowances
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	$ (1,168)	$ (1,381)