Loans Receivable and Allowance for Loan Losses (Allowance for Loan Losses and Recorded Investment in Financing Receivables) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance,	$ 8,099	$ 6,901	$ 7,634	$ 6,463
Charge Offs	(232)	(90)	(331)	(274)
Recoveries	34	8	48	30
Provision for loan losses	425	600	975	1,200
Ending balance,	8,326	7,419	8,326	7,419
Ending balance collectively evaluated for impairment	8,326	7,419	8,326	7,419
Residential Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance,	1,525	1,179	1,272	1,092
Charge Offs	(24)	(44)	(75)	(83)
Recoveries	1	2	2	3
Provision for loan losses	(47)	117	256	242
Ending balance,	1,455	1,254	1,455	1,254
Ending balance collectively evaluated for impairment	1,455	1,254	1,455	1,254
Commercial Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance,	5,129	4,831	5,265	4,623
Charge Offs	(134)	(11)	(134)	(96)
Recoveries	25	2	31	4
Provision for loan losses	227	406	85	697
Ending balance,	5,247	5,228	5,247	5,228
Ending balance collectively evaluated for impairment	5,247	5,228	5,247	5,228
Construction Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance,	120	95	90	78
Charge Offs		(5)		(13)
Recoveries				12
Provision for loan losses	8	3	38	16
Ending balance,	128	93	128	93
Ending balance collectively evaluated for impairment	128	93	128	93
Commercial, Financial And Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance,	638	369	463	307
Charge Offs	(5)		(5)
Provision for loan losses	57	(9)	232	53
Ending balance,	690	360	690	360
Ending balance collectively evaluated for impairment	690	360	690	360
Consumer Loans To Individuals [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance,	687	427	544	363
Charge Offs	(69)	(30)	(117)	(82)
Recoveries	8	4	15	11
Provision for loan losses	180	83	364	192
Ending balance,	806	484	806	484
Ending balance collectively evaluated for impairment	$ 806	$ 484	$ 806	$ 484

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

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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.

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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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