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Federal Home Loan Bank and Short-term Borrowings (Details)	12 Months Ended
	Dec. 31, 2017 USD ($) item	Dec. 31, 2016 USD ($)
Derivative [Line Items]
Number of interest rate swap designated as cash flow | item	3
Notional Value	$ 20,000,000
Term	5 years
Number of derivative become effect in july and august 2018 | item	2
Gain (Loss) on interest rate cash flow hedge ineffectiveness	$ 0
Assets/ Liabilities	49,000
Unrealized Gain (Loss) AOCI	35,000
Interest expense recorded on these swap transactions	12,000
Fair value of cash or investment securities pledged as collateral	750,000	$ 0
Interest Rate Swap On FHLB Advance [Member]
Derivative [Line Items]
Notional Value	$ 10,000,000
Pay Rate	2.105%
Receive Rate	3M LIBOR
Assets/ Liabilities	$ 30,000
Unrealized Gain (Loss) AOCI	21,000
Interest expense recorded on these swap transactions	12,000
Forward-starting interest rate swap on FHLB advance maturing on July 2023
Derivative [Line Items]
Notional Value	$ 5,000,000
Pay Rate	2.235%
Receive Rate	3M LIBOR
Assets/ Liabilities	$ 10,000
Unrealized Gain (Loss) AOCI	7,000
Forward-starting interest rate swap on FHLB advance maturing on August 2023
Derivative [Line Items]
Notional Value	$ 5,000,000
Pay Rate	2.246%
Receive Rate	3M LIBOR
Assets/ Liabilities	$ 9,000
Unrealized Gain (Loss) AOCI	$ 7,000

X

- Definition

The reference rate for the variable rate of the derivative, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

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- Definition

Amount of interest expense on swap transactions.

+ References

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- Definition

Number of Derivative Become Effect In July and August 2018.

+ References

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- Definition

Amount of unrealized gain (loss) related to the increase or decrease in fair value of interest rate derivatives designated as cash flow hedging instruments, which was recorded in accumulated other comprehensive income to the extent that the cash flow hedge was determined to be effective.

+ References

No definition available.

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- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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- Definition

Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

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- Definition

Fixed interest rate related to the interest rate derivative.

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- Definition

Fair value of securities pledged as collateral against derivative liabilities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=82849420&loc=SL20226013-175313

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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.

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- Definition

Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The net gain (loss) during the reporting period due to ineffectiveness in interest rate cash flow hedges. Recognized in earnings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959

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- Definition

Number of interest rate derivative instruments held by the entity at the reporting date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
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