Borrowed Funds (Narrative) (Details) - USD ($) $ in Millions |
Sep. 30, 2017 |
Jun. 30, 2017 |
|---|---|---|
| Borrowed Funds [Abstract] | ||
| Repurchase agreements secured by available for sale securities | $ 64.4 | |
| FHLB advances secured by loans receivable | $ 176.2 | |
| Minimum fair value percentage pledged against account balances | 102.00% |