Derivative Instruments (Details) number in Thousands, $ in Thousands	3 Months Ended
	Apr. 30, 2016 USD ($)	May. 02, 2015 USD ($)
Fuel [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	7,225
Energy Related Derivative [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative, Fair Value, Net	$ (3,185)	$ (4,665)
Energy Related Derivative [Member] | Other Nonoperating Income (Expense) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Sale of Commodity Contracts	(510)	0
Unrealized Gain (Loss) on Commodity Contracts	1,480	28
Derivative, Gain (Loss) on Derivative, Net	970	28
Energy Related Derivative [Member] | Other Current Assets [Member]
Derivative Asset [Abstract]
Derivative Asset, Current	41	78
Energy Related Derivative [Member] | Other Assets [Member]
Derivative Asset [Abstract]
Derivative asset, Other assets	767	794
Energy Related Derivative [Member] | Accrued Operating Expenses [Member]
Derivative Liability [Abstract]
Derivative Liability, Current	(1,668)	(2,799)
Energy Related Derivative [Member] | Other Liabilities [Member]
Derivative Liability [Abstract]
Derivative Liability, Other Liabilities	$ (2,325)	$ (2,738)