Significant Accounting Policies Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 29, 2017	Jul. 30, 2016	Jul. 29, 2017	Jul. 30, 2016	Jan. 28, 2017	Jan. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	$ 10,657	$ (4,903)	$ 6,537	$ 7,246
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Reclassification Adjustments, Net of Tax			33	276
Other comprehensive income (loss), before reclassification adjustment			6,570	7,522
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax			2,161	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax			(54)	0
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent	527	0	2,107	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			8,698	7,246
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax			(263)	103	$ (242)	$ (173)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	973,279	941,370	973,279	941,370	937,488
Other Comprehensive Income, Other, Net of Tax			(21)	276
Other Comprehensive Income (Loss), Net of Tax			8,677	7,522
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax			(5,001)	(13,284)	(13,699)	(20,530)
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ (5,264)	$ (13,181)	$ (5,264)	$ (13,181)	$ (13,941)	$ (20,703)