Summary of Significant Accounting Policies (Restricted Cash, Cash Equivalents and Investments) (Details) - USD ($) $ in Thousands	Aug. 03, 2019	Feb. 02, 2019	Aug. 04, 2018
Accounting Policies [Abstract]
Prepaid expenses and other	$ 0	$ 400	$ 2,812
Total restricted investments	$ 0	$ 400	$ 2,812

Investments which are not defined as or included in marketable (debt, equity, or other) securities whose use is restricted in whole or in part, generally by contractual agreements or regulatory requirements. For use in an unclassified balance sheet.

No definition available.

Name:	us-gaap_RestrictedInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant