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Borrowed Funds and Debt Obligations - Narrative (Details)
12 Months Ended
Dec. 31, 2015
USD ($)
note
Dec. 31, 2014
USD ($)
Mar. 15, 2016
USD ($)
Debt Instrument [Line Items]      
Collateral pledged to Federal Home Loan Bank $ 167,700,000    
Interest rate of Federal Home Loan Bank advances, minimum 0.21% 1.66%  
Interest rate of Federal Home Loan Bank advances, maximum 3.64% 3.64%  
FHLB advances with maturities next year $ 60,000,000 $ 15,000,000  
Gain on extinguishment of debt $ 1,750,000 0  
Credit facilities   10,250,000  
Number of credit facilities | note 2    
Secured debt      
Debt Instrument [Line Items]      
Credit facilities   10,300,000  
London Interbank Offered Rate (LIBOR) | Subordinated debt      
Debt Instrument [Line Items]      
Credit facilities   10,000,000  
Equity securities | London Interbank Offered Rate (LIBOR) | Secured debt      
Debt Instrument [Line Items]      
Credit facilities   $ 250,000  
Collateralized mortgage backed securities      
Debt Instrument [Line Items]      
Collateral pledged to Federal Home Loan Bank $ 291,600,000    
Subsequent event      
Debt Instrument [Line Items]      
FHLB advances that matured and were renewed     $ 40,000,000