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Loans (Details 3) - USD ($) $ in Thousands | Jun. 30, 2018 | Jun. 30, 2017
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Financing Receivable, Modifications [Line Items] |  |
Financing Receivable, Recorded Investment, Nonaccrual | $ 5,246 | $ 5,029
Financing Receivable, Recorded Investment, Loans Past Due Over 90 Days Still Accruing | 2,419 | 1,781
Farm [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Financing Receivable, Recorded Investment, Nonaccrual | 310 |
Financing Receivable, Recorded Investment, Loans Past Due Over 90 Days Still Accruing |  |
Commercial and industrial [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Financing Receivable, Recorded Investment, Nonaccrual | 7 |
Financing Receivable, Recorded Investment, Loans Past Due Over 90 Days Still Accruing |  |
One-to four-family [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Financing Receivable, Recorded Investment, Nonaccrual | 4,210 | 4,870
Financing Receivable, Recorded Investment, Loans Past Due Over 90 Days Still Accruing | 2,419 | 1,770
Nonresidential real estate [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Financing Receivable, Recorded Investment, Nonaccrual | 708 | 151
Financing Receivable, Recorded Investment, Loans Past Due Over 90 Days Still Accruing |  |
Consumer [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Financing Receivable, Recorded Investment, Nonaccrual | 11 | 8
Financing Receivable, Recorded Investment, Loans Past Due Over 90 Days Still Accruing |  | $ 11

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