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Borrowed Funds (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Debt Instrument [Line Items]    
Repurchase agreements secured by available for sale securities $ 140,000 $ 192,000
FHLB, available funds 381,000  
FHLB available credit $ 104,200  
Borrowing capacity to assets, percentage 29.00%  
Federal Home Loan Bank Advances [Member]    
Debt Instrument [Line Items]    
FHLB advances secured by loans receivable $ 223,000  
Securities Sold under Agreements to Repurchase [Member]    
Debt Instrument [Line Items]    
Repurchase agreements secured by available for sale securities 59,200  
Various Financial Institutions [Member]    
Debt Instrument [Line Items]    
Line of credit facility, available funding 70,000  
Line of Credit Facility, Amount Outstanding 0  
Federal Reserve Bank [Member]    
Debt Instrument [Line Items]    
Line of credit facility, available funding 17,200  
Brokered Money Market Funds [Member]    
Debt Instrument [Line Items]    
Line of credit facility, available funding $ 102,100  
Maximum [Member]    
Debt Instrument [Line Items]    
Debt instrument, term 10 years  
Minimum [Member]    
Debt Instrument [Line Items]    
Debt instrument, term 5 years