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Federal Home Loan Bank Advances (Details) - USD ($)
Dec. 31, 2016
Dec. 31, 2015
Federal Home Loan Bank Advances [Abstract]    
Federal Home Loan Bank Advances, long term $ 0 $ 0
Federal Home Loan Bank Advances, short term 0 $ 0
Borrowing capacity of advances secured by FHLB stock and other securities 200,000  
Collateral on borrowing lines 664,700,000  
Borrowing capacity $ 566,500,000