Summary of Significant Accounting Policies (Restricted Cash, Cash Equivalents and Investments) (Details) - USD ($) $ in Thousands	Nov. 03, 2018	Feb. 03, 2018	Oct. 28, 2017
Accounting Policies [Abstract]
Prepaid expenses and other	$ 2,801	$ 2,435	$ 688
Other long-term assets	0	403	2,862
Total restricted investments	$ 2,801	$ 2,838	$ 3,550

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