Loans Receivable and Allowance for Loan Losses (Allowance for Loan Losses and Recorded Investment in Financing Receivables) (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance,	$ 7,634	$ 6,463
Charge Offs	(99)	(184)
Recoveries	14	22
Provision for loan losses	550	600
Ending balance,	8,099	6,901
Ending balance collectively evaluated for impairment	8,099	6,901
Residential Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance,	1,272	1,092
Charge Offs	(51)	(39)
Recoveries	1	1
Provision for loan losses	303	125
Ending balance,	1,525	1,179
Ending balance collectively evaluated for impairment	1,525	1,179
Commercial Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance,	5,265	4,623
Charge Offs		(85)
Recoveries	6	2
Provision for loan losses	(142)	291
Ending balance,	5,129	4,831
Ending balance collectively evaluated for impairment	5,129	4,831
Construction Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance,	90	78
Charge Offs		(8)
Recoveries		12
Provision for loan losses	30	13
Ending balance,	120	95
Ending balance collectively evaluated for impairment	120	95
Commercial, Financial And Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance,	463	307
Provision for loan losses	175	62
Ending balance,	638	369
Ending balance collectively evaluated for impairment	638	369
Consumer Loans To Individuals [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance,	544	363
Charge Offs	(48)	(52)
Recoveries	7	7
Provision for loan losses	184	109
Ending balance,	687	427
Ending balance collectively evaluated for impairment	$ 687	$ 427

A valuation allowance for financing receivables that are expected to be uncollectible.

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- Definition

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

+ References

+ 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.

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- Definition

Amount of recovery of financing receivables doubtful of collection that were previously charged off.

+ References

+ Details

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- Definition

Amount of direct write-downs of financing receivables charged against the allowance.

+ References

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- Definition

Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.11)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

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