Income Tax (Details) - USD ($) $ in Thousands	9 Months Ended
	Oct. 30, 2015	Oct. 31, 2014
Difference between the provision for income taxes and income taxes at the statutory federal income tax rate, tax rate reconciliation
Effective income tax rate (as a percent)	(16.50%)	40.70%
DEFERRED TAX ASSETS
Increase in provision for income tax	$ 31,704	$ 465