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Borrowings (Narrative) (Details) - USD ($)
Dec. 31, 2016
Dec. 31, 2015
Available-for-sale Securities Pledged as Collateral $ 230,263,000 $ 97,671,000
FHLB of Pittsburgh [Member]    
Long-term Line of Credit 0 19,672,000
Line of Credit Facility, Maximum Borrowing Capacity 146,517,000  
Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available 316,832,000  
Advances from Federal Home Loan Banks 32,001,000  
Atlantic Central Bankers Bank [Member]    
Long-term Line of Credit 0 0
Line of Credit Facility, Maximum Borrowing Capacity 7,000,000  
PNC Bank [Member]    
Long-term Line of Credit 0 0
Line of Credit Facility, Maximum Borrowing Capacity 16,000,000  
Zion Bank [Member]    
Long-term Line of Credit 0 0
Line of Credit Facility, Maximum Borrowing Capacity 17,000,000  
Securities Sold under Agreements to Repurchase [Member]    
Available-for-sale securities pledged as collateral, amortized cost 35,770,000 36,797,000
Available-for-sale Securities Pledged as Collateral $ 35,147,000 $ 36,316,000