Accumulated Unrealized Gains (Losses) - (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015
Short-Term Debt Investments
ScheduleOfAvailableForSaleSecuritiesLineItems
Unrealized Gain / (Loss)	$ 978	$ 963
Deferred Tax Benefit	(368)	(362)
Unrealized Net Gain / (Loss)	610	601
Equity Investments
ScheduleOfAvailableForSaleSecuritiesLineItems
Unrealized Gain / (Loss)	304	297
Deferred Tax Benefit	(114)	(112)
Unrealized Net Gain / (Loss)	$ 190	$ 185