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Loans, Trouble Debt Restructuring (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) Contract	Mar. 31, 2017 USD ($) Contract	Dec. 31, 2017 USD ($)
Loans [Abstract]
Reserves of allowance for loan losses	$ 37		$ 41
Financing receivable modifications [Abstract]
Number of contract, subsequently defaults | Contract	0	0
Interest Modification [Member]
Financing receivable modifications [Abstract]
Number of contracts | Contract	0	0
Pre-modification outstanding recorded investment	$ 0	$ 0
Post-modification outstanding recorded investment	$ 0	$ 0
Term Modification [Member]
Financing receivable modifications [Abstract]
Number of contracts | Contract	1	2
Pre-modification outstanding recorded investment	$ 7	$ 703
Post-modification outstanding recorded investment	$ 7	$ 703
Real Estate Loans [Member] | Mortgages [Member] | Interest Modification [Member]
Financing receivable modifications [Abstract]
Number of contracts | Contract	0
Pre-modification outstanding recorded investment	$ 0
Post-modification outstanding recorded investment	$ 0
Real Estate Loans [Member] | Mortgages [Member] | Term Modification [Member]
Financing receivable modifications [Abstract]
Number of contracts | Contract	1
Pre-modification outstanding recorded investment	$ 7
Post-modification outstanding recorded investment	$ 7
Real Estate Loans [Member] | Commercial [Member] | Interest Modification [Member]
Financing receivable modifications [Abstract]
Number of contracts | Contract		0
Pre-modification outstanding recorded investment		$ 0
Post-modification outstanding recorded investment		$ 0
Real Estate Loans [Member] | Commercial [Member] | Term Modification [Member]
Financing receivable modifications [Abstract]
Number of contracts | Contract		2
Pre-modification outstanding recorded investment		$ 703
Post-modification outstanding recorded investment		$ 703

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Amount of allowance for credit losses related to recorded investment in financing receivable categorized as troubled debt restructuring.

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Number of 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 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

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Post-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

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Pre-modification amount of investment in financing receivables modified by troubled debt restructurings.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

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Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default.

+ References

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-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953682-111524

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