Fair Value Measurements (Narrative) (Details) - USD ($)	3 Months Ended	9 Months Ended
Oct. 28, 2017	Oct. 28, 2017
Fair Value Disclosures [Abstract]
Long-lived assets, impairment charges	$ 105,000	$ 1,700,000
Remaining unamortized basis	$ 153,000	$ 1,200,000

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration