Derivative Instruments (Details) number in Thousands, $ in Thousands	3 Months Ended
	Apr. 29, 2017 USD ($)	Apr. 30, 2016 USD ($)	Jan. 28, 2017 USD ($)
Fuel [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	5,900		4,425
Energy Related Derivative [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative, Fair Value, Net	$ (1,229)		$ (1,008)
Energy Related Derivative [Member] | Other Nonoperating Income (Expense) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Sale of Commodity Contracts	(285)	$ (510)
Unrealized Gain (Loss) on Commodity Contracts	(221)	1,480
Derivative, Gain (Loss) on Derivative, Net	(506)	$ 970
Energy Related Derivative [Member] | Other Current Assets [Member]
Derivative Asset [Abstract]
Derivative Asset, Current	119		135
Energy Related Derivative [Member] | Other Assets [Member]
Derivative Asset [Abstract]
Derivative asset, Other assets	568		180
Energy Related Derivative [Member] | Accrued Operating Expenses [Member]
Derivative Liability [Abstract]
Derivative Liability, Current	(1,001)		(1,001)
Energy Related Derivative [Member] | Other Liabilities [Member]
Derivative Liability [Abstract]
Derivative Liability, Other Liabilities	$ (915)		$ (322)