Derivative Instruments (Details) number in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 29, 2017 USD ($)	Jul. 30, 2016 USD ($)	Jul. 29, 2017 USD ($)	Jul. 30, 2016 USD ($)	Jan. 28, 2017 USD ($)
Fuel [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	5,150		5,150		4,425
Energy Related Derivative [Member]
Derivative Liability [Abstract]
Derivative, Fair Value, Net	$ (658)		$ (658)		$ (1,008)
Energy Related Derivative [Member] | Other Nonoperating Income (Expense) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Sale of Commodity Contracts	(213)	$ (561)	(499)	$ (1,362)
Unrealized Gain (Loss) on Commodity Contracts	571	184	350	1,664
Derivative, Gain (Loss) on Derivative, Net	358	$ (377)	(149)	$ 302
Energy Related Derivative [Member] | Other Current Assets [Member]
Derivative Asset [Abstract]
Derivative Asset, Current	129		129		135
Energy Related Derivative [Member] | Other Assets [Member]
Derivative Asset [Abstract]
Derivative Asset	403		403		180
Energy Related Derivative [Member] | Accrued Operating Expenses [Member]
Derivative Liability [Abstract]
Derivative Liability, Current	(632)		(632)		(1,001)
Energy Related Derivative [Member] | Other Liabilities [Member]
Derivative Liability [Abstract]
Derivative Liability	$ (558)		$ (558)		$ (322)