Annual report pursuant to Section 13 and 15(d)

Goodwill and Other Intangible Assets (Details Textual)

v3.8.0.1
Goodwill and Other Intangible Assets (Details Textual) - USD ($)
 3 Months Ended 12 Months Ended
Jun. 30, 2016
Dec. 31, 2017
Dec. 31, 2016
Indefinite-lived Intangible Assets [Line Items]      
Goodwill   $ 2,792,000 $ 2,792,000
Pool Of Purchased Loans [Member]      
Indefinite-lived Intangible Assets [Line Items]      
Goodwill, Purchase Accounting Adjustments $ 178,000    
Fixed Assets Valuations [Member]      
Indefinite-lived Intangible Assets [Line Items]      
Goodwill, Purchase Accounting Adjustments 109,000    
Accrued WithDrawal Liability [Member]      
Indefinite-lived Intangible Assets [Line Items]      
Goodwill, Purchase Accounting Adjustments $ 162,000    
First Federal Acquisition [Member]      
Indefinite-lived Intangible Assets [Line Items]      
Goodwill   2,000,000  
Amortization of Intangible Assets   12,000 12,000
First Federal Acquisition [Member] | Loans Receivable [Member]      
Indefinite-lived Intangible Assets [Line Items]      
Accretion (Amortization) of Discounts and Premiums, Investments   1,100,000  
Accretion Expense   $ 149,000 217,000
First Federal Acquisition [Member] | Loans Receivable [Member] | Home Equity Line of Credit [Member]      
Indefinite-lived Intangible Assets [Line Items]      
Accretion Amortization Of Discounts And Premiums Term   55 months  
First Federal Acquisition [Member] | During 2018 [Member] | Loans Receivable [Member]      
Indefinite-lived Intangible Assets [Line Items]      
Accretion (Amortization) of Discounts and Premiums, Investments   $ 160,000  
First Federal Acquisition [Member] | 2018 through 2021      
Indefinite-lived Intangible Assets [Line Items]      
Amortization of Intangible Assets   12,000  
Core Deposits [Member] | First Federal Acquisition [Member]      
Indefinite-lived Intangible Assets [Line Items]      
Finite-Lived Core Deposits, Gross   $ 93,000  
Finite-Lived Intangible Asset, Useful Life   7 years 10 months 24 days  
Liberty Savings [Member]      
Indefinite-lived Intangible Assets [Line Items]      
Goodwill   $ 804,000  
Amortization of Intangible Assets   58,000 58,000
Liberty Savings [Member] | Certificates of Deposit [Member]      
Indefinite-lived Intangible Assets [Line Items]      
Accretion (Amortization) of Discounts and Premiums, Investments   $ 124,000  
Accretion Amortization Of Discounts And Premiums Term   17 months  
Amortization Expense   $ 0 80,000
Liberty Savings [Member] | Loans Receivable [Member]      
Indefinite-lived Intangible Assets [Line Items]      
Accretion (Amortization) of Discounts and Premiums, Investments   $ 1,200,000  
Accretion Amortization Of Discounts And Premiums Term   44 months  
Accretion Expense   $ 307,000 $ 389,000
Liberty Savings [Member] | During 2018 [Member]      
Indefinite-lived Intangible Assets [Line Items]      
Accretion Expense   264,000  
Liberty Savings [Member] | During 2019 [Member] | Loans Receivable [Member]      
Indefinite-lived Intangible Assets [Line Items]      
Accretion Expense   44,000  
Liberty Savings [Member] | First Federal Acquisition [Member]      
Indefinite-lived Intangible Assets [Line Items]      
Goodwill   2,800,000  
Liberty Savings [Member] | Core Deposits [Member]      
Indefinite-lived Intangible Assets [Line Items]      
Finite-Lived Core Deposits, Gross   $ 471,000  
Finite-Lived Intangible Asset, Useful Life   8 years 2 months 12 days  
Liberty Savings [Member] | Core Deposits [Member] | 2018 through 2022      
Indefinite-lived Intangible Assets [Line Items]      
Amortization of Intangible Assets   $ 58,000