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Borrowings (Collateral Pledged for Repurchase Agreements) (Details) - USD ($) | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Assets Sold under Agreements to Repurchase [Line Items] |  |
Available-for-sale Securities Pledged as Collateral | $ 97,671,000 | $ 102,994,000
Short-term Borrowings | 53,235,000 | 25,695,000
US Treasury Securities [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Available-for-sale Securities Pledged as Collateral | 36,316,000 |
Maturity Overnight [Member] | US Treasury Securities [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Available-for-sale Securities Pledged as Collateral | 35,515,000 |
Maturity Less than 30 Days [Member] | US Treasury Securities [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Available-for-sale Securities Pledged as Collateral | 139,000 |
Maturity 30 to 90 Days [Member] | US Treasury Securities [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Available-for-sale Securities Pledged as Collateral | 277,000 |
Maturity Greater than 90 Days [Member] | US Treasury Securities [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Available-for-sale Securities Pledged as Collateral | 385,000 |
Securities Sold under Agreements to Repurchase [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Available-for-sale Securities Pledged as Collateral | 36,316,000 | 28,437,000
Short-term Borrowings | $ 33,563,000 | $ 25,695,000

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