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, 2017	Mar. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance at beginning of period	$ 6,463	$ 7,298
Charge Offs	(184)	(136)
Recoveries	22	30
Provision for loan losses	600	450
Allowance at end of period	6,901	7,642
Ending balance individually evaluated for impairment		1,644
Ending balance collectively evaluated for impairment	6,901	5,998
Residential Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance at beginning of period	1,092	1,069
Charge Offs	(39)	0
Recoveries	1	1
Provision for loan losses	125	7
Allowance at end of period	1,179	1,077
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	1,179	1,077
Commercial Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance at beginning of period	4,623	5,506
Charge Offs	(85)	(129)
Recoveries	2	2
Provision for loan losses	291	379
Allowance at end of period	4,831	5,758
Ending balance individually evaluated for impairment	0	1,644
Ending balance collectively evaluated for impairment	4,831	4,114
Construction Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance at beginning of period	78	90
Charge Offs	(8)	0
Recoveries	12	0
Provision for loan losses	13	19
Allowance at end of period	95	109
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	95	109
Commercial, financial and agricultural loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance at beginning of period	307	397
Charge Offs	0	0
Recoveries	0	0
Provision for loan losses	62	49
Allowance at end of period	369	446
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	369	446
Consumer loans to individuals [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance at beginning of period	363	236
Charge Offs	(52)	(7)
Recoveries	7	27
Provision for loan losses	109	(4)
Allowance at end of period	427	252
Ending balance individually evaluated for impairment	0	0
Ending balance collectively evaluated for impairment	$ 427	$ 252

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

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- Definition

Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

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- Definition

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

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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No definition available.

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- Definition

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.

+ 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 (g)
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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Amount of expense related to estimated loss from loan and lease transactions.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
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