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Fair Value (Details Textual) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2016
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |
Fair value assets liabilities transfers amount between level 1 and level 2 |  |  | $ 0 | $ 0 |
Impaired loans, unpaid principal balance with allowance recorded | $ 2,242,000 |  | 2,242,000 |  | $ 2,710,000
Impaired loans, allowance | 92,000 |  | 92,000 |  | 249,000
Provision for loan losses | 950,000 | $ 990,000 | 2,000,000 | 1,770,000 | 0
Troubled debt restructurings | 5,800,000 |  | $ 5,800,000 |  | 7,000,000
Maximum maturity period of short term borrowings |  |  | 90 days |  |
Measured Using Present Value of Cash Flows |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |
Troubled debt restructurings | 2,000,000 |  | $ 2,000,000 |  | 2,000,000
Collateral Dependent Impaired Loans |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |
Impaired loans, unpaid principal balance with allowance recorded | 207,000 |  | 207,000 |  | 727,000
Impaired loans, allowance | 21,000 |  | $ 21,000 |  | $ 173,000
Provision for loan losses | $ 153,000 |  |  | $ 0 |

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- Definition The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=82895541&loc=d3e18845-111554 + Details
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