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Borrowings (Short-Term Borrowings) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Short-term Debt [Line Items]    
Short-term Borrowings $ 32,811 $ 53,235
Securities Sold under Agreements to Repurchase [Member]    
Short-term Debt [Line Items]    
Short-term Borrowings $ 32,811 33,563
FHLB of Pittsburgh [Member] | Federal Home Loan Bank Advances [Member]    
Short-term Debt [Line Items]    
Short-term Borrowings   $ 19,672