Changes in Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	May 03, 2014	May 04, 2013
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance Accumulated other comprehensive income, net of tax	$ 778
Other Comprehensive Income Loss Before Reclassifications Net Of Tax		153
Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax		(42)
Unrealized gain on available-for-sale securities, net of deferred income taxes	(51)	111
Ending Balance Accumulated other comprehensive income, net of tax	727	932
ChangeInUnrealizedGainsOnAvailableForSaleSecuritiesMember [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance Accumulated other comprehensive income, net of tax		821
Other Comprehensive Income Loss Before Reclassifications Net Of Tax	(33)
Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax	(18)
Unrealized gain on available-for-sale securities, net of deferred income taxes	(51)	111
Ending Balance Accumulated other comprehensive income, net of tax		$ 932