Income Taxes - Unrecognized tax benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Reconciliation of the total amounts of unrecognized tax benefits
Unrecognized Tax Benefit – Beginning of Period	$ 14,639	$ 3,997	$ 10,960
Gross Increases (Decreases) – Tax Positions in a Prior Period	(7,585)	9,328	231
Gross Increases (Decreases) – Tax Positions in a Current Period	491	1,403	(287)
Settlements	(742)	0	0
Lapse of Statutes of Limitations	(1,181)	(89)	(6,907)
Unrecognized Tax Benefit – End of Period	$ 5,622	$ 14,639	$ 3,997