Significant Accounting Policies - Allowances Against Accounts Receivable (Details) - USD ($) $ in Thousands	Jan. 28, 2018	Jan. 29, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	$ (9,089)	$ (8,230)
Allowance for Doubtful Accounts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	(2,700)	(2,696)
Sales Rebates Allowance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	(2,634)	(2,571)
Sales Returns Allowance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	(2,018)	(1,795)
Other Allowances
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	$ (1,737)	$ (1,168)