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Borrowed Funds (Summary of Short Term Borrowings) (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2019 | Dec. 31, 2018
Overnight borrowings, weighted average interest rate |  | 2.70%
Outstanding at end of period | $ 31,155 | $ 77,707
Short-term Correspondent Bank Advance |  |
Overnight borrowings |  | 40,000
Securities Sold under Agreements to Repurchase [Member] |  |
Outstanding at end of period | $ 31,155 | $ 37,707
Weighted average interest rate | 0.35% | 0.24%
Maximum amount outstanding as of any month end | $ 40,579 | $ 55,648
Average amount outstanding | $ 37,218 | $ 44,045
Approximate weighted average rate during the period | 0.29% | 0.20%

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