Summary of Significant Accounting Policies - Equity Method Investments (Details)	12 Months Ended
Sep. 30, 2018
Cash Converters International Limited
Schedule of Equity Method Investments [Line Items]
Income from investment, period of lag	3 months

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