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Federal Home Loan Bank Advances - FHLB Advances (Details) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Federal home loan bank advances    
General borrowing limit 30.00%  
FHLB advances, remaining amount available to borrow $ 38.3  
First mortgage loans    
Federal home loan bank advances    
FHLB advances, collateral real estate loans $ 135.2 $ 193.6