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Loans Receivable and Allowance for Loan Losses (Composition Of The Loan Portfolio) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	$ 803,943		$ 764,335
Deferred fees, net	(170)		(243)
Total loans receivable	803,773		764,092
Allowance for loan losses	(8,326)	$ (8,099)	(7,634)	$ (7,419)	$ (6,901)	$ (6,463)
Net loans receivable	$ 795,447		$ 756,458
Percent of Loans	100.00%		100.00%
Residential Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	$ 230,840		$ 235,759
Allowance for loan losses	$ (1,455)	(1,525)	$ (1,272)	(1,254)	(1,179)	(1,092)
Percent of Loans	28.70%		30.80%
Commercial Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	$ 364,686		$ 342,934
Allowance for loan losses	$ (5,247)	(5,129)	$ (5,265)	(5,228)	(4,831)	(4,623)
Percent of Loans	45.40%		44.90%
Construction Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	$ 18,115		$ 17,228
Allowance for loan losses	$ (128)	(120)	$ (90)	(93)	(95)	(78)
Percent of Loans	2.20%		2.30%
Commercial, Financial And Agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	$ 101,779		$ 97,461
Allowance for loan losses	$ (690)	(638)	$ (463)	(360)	(369)	(307)
Percent of Loans	12.70%		12.70%
Consumer Loans To Individuals [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	$ 88,523		$ 70,953
Allowance for loan losses	$ (806)	$ (687)	$ (544)	$ (484)	$ (427)	$ (363)
Percent of Loans	11.00%		9.30%

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

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
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Amount of deferred interest and fee income, unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of acquired loans. Excludes amounts for loans and leases covered under loss sharing agreements.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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