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Loans Receivable and Allowance for Loan Losses (Composition of Loans Receivable) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	$ 735,222		$ 714,105
Deferred fees, net	(196)		(216)
Total loans receivable	735,026		713,889
Allowance for loan losses	(7,419)	$ (6,901)	(6,463)	$ (5,798)	$ (7,642)	$ (7,298)
Net loans receivable	$ 727,607		$ 707,426
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	$ 234,251		$ 237,177
Allowance for loan losses	$ (1,254)	(1,179)	$ (1,092)	(976)	(1,077)	(1,069)
Percent of Loans	31.90%		33.20%
Commercial Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	$ 335,602		$ 320,187
Allowance for loan losses	$ (5,228)	(4,831)	$ (4,623)	(4,191)	(5,758)	(5,506)
Percent of Loans	45.60%		44.80%
Construction Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	$ 17,673		$ 19,709
Allowance for loan losses	$ (93)	(95)	$ (78)	(59)	(109)	(90)
Percent of Loans	2.40%		2.80%
Commercial, financial and agricultural loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	$ 84,502		$ 85,508
Allowance for loan losses	$ (360)	(369)	$ (307)	(293)	(446)	(397)
Percent of Loans	11.50%		12.00%
Consumer loans to individuals [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	$ 63,194		$ 51,524
Allowance for loan losses	$ (484)	$ (427)	$ (363)	$ (279)	$ (252)	$ (236)
Percent of Loans	8.60%		7.20%

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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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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