Derivative Instruments (Details) number in Thousands, $ in Thousands	12 Months Ended
	Jan. 28, 2017 USD ($)	Jan. 30, 2016 USD ($)
Fuel [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	4,425	8,175
Energy Related Derivative [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative, Fair Value, Net	$ (1,008)	$ (4,665)
Energy Related Derivative [Member] | Other Nonoperating Income (Expense) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Sale of Commodity Contracts	(2,299)	(535)
Unrealized Gain (Loss) on Commodity Contracts	3,657	(4,665)
Derivative, Gain (Loss) on Derivative, Net	1,358	(5,200)
Energy Related Derivative [Member] | Other Current Assets [Member]
Derivative Asset [Abstract]
Derivative Asset, Current	135	78
Energy Related Derivative [Member] | Other Assets [Member]
Derivative Asset [Abstract]
Derivative Asset	180	794
Energy Related Derivative [Member] | Accrued Operating Expenses [Member]
Derivative Liability [Abstract]
Derivative Liability, Current	(1,001)	(2,799)
Energy Related Derivative [Member] | Other Liabilities [Member]
Derivative Liability [Abstract]
Derivative Liability	$ (322)	$ (2,738)