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Summary of Significant Accounting Policies (Detail Textuals) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015
Summary Of Significant Accounting Policies [Line Items] |  |
Mortgage loans held for sale | $ 162,000 | $ 1,200,000
Depreciation methods | Straight line and accelerated methods |
Sustained period of repayment performance for non-accrual TDRs | 6 months |
Period of employees highest compensation before retirement | 10 years |
Buildings and improvements |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Estimated useful lives | 5 to 40 years |
Furniture and equipment |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Estimated useful lives | 3 to 15 years |
Federal Home Loan Bank of Des Moines |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Investment in capital stock of the Federal Home Loan Bank of total assets | 0.12% |
Investment in capital stock of Federal Home Loan Bank required percentage of advances | 4.00% |

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- Definition Represents the period of employees highest compensation before retirement used to calculate the basis of benefits under the defined benefit pension plan. + References No definition available. + Details
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- Definition Represents the percentage of advances from the FHLB to the Bank in which that amount is required to be maintained as an investment in the capital stock of the FHLB. + References No definition available. + Details
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- Definition Represents the amount of investment in capital stock of the Federal Home Loan Bank equal to basis points of year- end total assets. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Represent period over which debtor demonstrates the ability to pay under the terms of the restructured note through a sustained period of repayment performance, for non-accrual TDRs to be returned to accruing status. + References No definition available. + Details
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- Definition Description of the methodology for computing depreciation for classes of depreciable assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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- Definition Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=68058157&loc=d3e18780-107790 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 35 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=68071081&loc=d3e1205-110223 + Details
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