Commitments and Contingencies (Details) $ in Thousands	Jul. 28, 2017 USD ($) Property
Standby Letters of Credit [Member] \| Revolving Credit Facility [Member]
Loss Contingencies [Line Items]
Letters of credit outstanding \| $	$ 9,655
Lease Performance Guarantee [Member]
Loss Contingencies [Line Items]
Number of properties for which the company is secondarily liable for lease payments \| Property	2

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_LossContingenciesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration