Securities - Additional Information (Details) |
Sep. 30, 2016 |
|---|---|
| Schedule Of Available For Sale Securities [Line Items] | |
| Weighted average yield, total | 0.90% |
| Agency mortgage backed securities and beneficial interests in FHLMC securitizations | |
| Schedule Of Available For Sale Securities [Line Items] | |
| Weighted average yield, total | 2.59% |