Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance Accumulated other comprehensive income, net of tax	$ 786	$ 778
Other Comprehensive Income Loss Before Reclassifications Net Of Tax	(114)	148
Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax	128	(140)
Unrealized losses on available-for-sale securities, net of deferred income tax benefit	14	8	$ (43)
Ending Balance Accumulated other comprehensive income, net of tax	$ 800	$ 786	$ 778