Summary of Significant Accounting Policies - Real Estate (Details) |
12 Months Ended |
---|---|
Sep. 30, 2016 | |
Minimum | |
Real Estate Properties [Line Items] | |
Percentage of sales price (at least) | 20.00% |
Maximum | |
Real Estate Properties [Line Items] | |
Percentage of sales price (at least) | 25.00% |