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Fair Value (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]          
Impaired Financing Receivable, Recorded Investment $ 4,778,000   $ 4,778,000   $ 1,496,000
Impaired Financing Receivables, Provisional Expenses 605,000 $ 98,000 813,000 $ 719,000  
Mortgage Servicing Rights at Fair Value 592,000   592,000   657,000
Valuation Allowance of Mortgage Servicing Rights 474,000   474,000   522,000
Proceeds from Collection of Loans Receivable 16,000 104,000 48,000 125,000  
Real Estate Held-for-sale, Increase (Decrease) in Fair Value 20,000 $ 0 20,000 $ 53,000  
Impaired Financing Receivable, Related Allowance 645,000   645,000   809,000
Collateral Dependent Loan [Member]          
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]          
Impaired Financing Receivable, Recorded Investment 4,800,000   4,800,000   1,500,000
Impaired Financing Receivable, Related Allowance $ 0   $ 0   $ 1,000
Minimum [Member] | Real Estate held for sale [Member]          
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]          
Fair Value Inputs, Discount Rate     0.00%    
Maximum [Member] | Real Estate held for sale [Member]          
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]          
Fair Value Inputs, Discount Rate     20.00%