Cash and Cash Equivalents (Cash and Cash Equivalents) (Details) - USD ($) $ in Thousands |
Sep. 30, 2017 |
Dec. 31, 2016 |
|---|---|---|
| Cash and Cash Equivalents [Line Items] | ||
| Cash and due from banks | $ 83,026 | $ 60,707 |
| Interest bearing deposits in banks | 2,008 | 2,603 |
| FHLB [Member] | ||
| Cash and Cash Equivalents [Line Items] | ||
| Interest bearing deposits in banks | $ 993 | 1,590 |
| Interest Rate | 1.06% | |
| M&T Fed Funds sold [Member] | ||
| Cash and Cash Equivalents [Line Items] | ||
| Interest bearing deposits in banks | $ 1,015 | $ 1,013 |
| Interest Rate | 0.15% | |
| Weighted Average [Member] | ||
| Cash and Cash Equivalents [Line Items] | ||
| Interest Rate | 0.78% |