Basis of Financial Statement Presentation - Additional Information (Details)	9 Months Ended
Oct. 28, 2017
Orchestra-Premaman S.A. and US OP Corporation
Basis Of Financial Statement Presentation [Line Items]
Date of merger agreement	Dec. 19, 2016
Orchestra-Premaman S.A., and Certain Other Affiliates of Orchestra
Basis Of Financial Statement Presentation [Line Items]
Termination agreement entry date	Jul. 27, 2017

Date when the business acquisition agreement was executed, in CCYY-MM-DD format.

No definition available.

Name:	us-gaap_BusinessAcquisitionDateOfAcquisitionAgreement1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration