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Loans Receivable (Details Textual) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Dec. 31, 2017
Jun. 30, 2017
Financing Receivable, Modifications [Line Items]    
TDRs carrying value $ 136  
Net of a purchase credit discount 388 $ 388
Troubled Debt Restructuring [Member] | Residential Real Estate One to Four Family [Member]    
Financing Receivable, Modifications [Line Items]    
Loans classified as TDRs $ 1,500 $ 1,500
Bankruptcy proceedings, percentage 17.40%