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Other Borrowings (Details Narrative) - USD ($)
Dec. 31, 2016
Dec. 31, 2015
Debt Disclosure [Abstract]    
Current Balance $ 25,000,000.0  
Maximum borrowing capacity, lines of credit 58,000,000 $ 58,000,000
Long-term line of credit 0 0
Unused borrowing capacity on established lines with FHLB 1,000,000,000 1,100,000,000
Unencumbered residential and commercial real estate loan 343,700,000  
Overnight FHLB advances 503,815,000 272,199,000
Term advances from FHLB $ 365,000,000 $ 250,576,000
Weighted average interest rate (percent) 1.02% 0.97%
Term advances mature within one year $ 215,000,000  
Term advances maturing after one year 150,000,000  
Term advances mature in 2018 140,000,000  
Term advances mature in 2019 10,000,000  
Term borrowing with a bank $ 16,000,000 $ 13,500,000