Segments Information - General Information (Details) - segment	3 Months Ended	6 Months Ended
Sep. 30, 2018	Jun. 30, 2018
Segments Information
Number of reportable segments	3	2
Retail
Segments Information
Number of segments separated into	2

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

No definition available.

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration