Valuation and Qualifying Accounts - (Parenthetical) (Details) - USD ($) $ in Thousands	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015	Sep. 30, 2014
Valuation And Qualifying Accounts [Abstract]
Cost value of estimated product returns	$ 775	$ 887	$ 1,085	$ 1,173