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Borrowings (Collateral Pledged for Repurchase Agreements) (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Assets Sold under Agreements to Repurchase [Line Items] |  |
Available-for-sale Securities Pledged as Collateral | $ 193,918 | $ 213,065
Short-term Borrowings | 53,046 | 42,530
Mortgage-backed Securities-Government Sponsored Entities [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Available-for-sale Securities Pledged as Collateral | 40,161 | 26,626
Maturity Overnight [Member] | Mortgage-backed Securities-Government Sponsored Entities [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Available-for-sale Securities Pledged as Collateral | 40,161 | 26,626
Securities Sold under Agreements to Repurchase [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Available-for-sale Securities Pledged as Collateral | 40,161 | 26,626
Short-term Borrowings | $ 37,457 | $ 24,286

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