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Loans and Allowance for loan losses (Allowance For Loan Losses And Recorded Investment In Loans) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses: Beginning Balance		$ 4,790	$ 5,186
Allowance for Loan Losses: Charge-offs		(615)	(551)
Allowance for Loan Losses: Recoveries		226	100
Allowance for Loan losses: Provision		282	55
Allowance for Loan Losses: Ending Balance		4,683	4,790
Allowance for Loan Losses: Ending Balance: Individually evaluated for impairment		1,294	1,058
Allowance for Loan Losses: Ending Balance: Collectively evaluated for impairment		3,389	3,732
Allowance for Loan Losses: Totals		4,683	4,790
Financing Receivables: Ending Balance: Individually evaluated for impairment		9,414	10,677
Financing Receivables: Ending Balance: Collectively evaluated for impairment		425,714	388,686
Total loans	[1]	435,128	399,363
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses: Beginning Balance		1,235	1,015
Allowance for Loan Losses: Charge-offs		(294)	(165)
Allowance for Loan Losses: Recoveries		14	51
Allowance for Loan losses: Provision		240	334
Allowance for Loan Losses: Ending Balance		1,195	1,235
Allowance for Loan Losses: Ending Balance: Individually evaluated for impairment		610	713
Allowance for Loan Losses: Ending Balance: Collectively evaluated for impairment		585	522
Allowance for Loan Losses: Totals		1,195	1,235
Financing Receivables: Ending Balance: Individually evaluated for impairment		1,180	3,423
Financing Receivables: Ending Balance: Collectively evaluated for impairment		75,593	59,386
Total loans		76,773	63,259
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses: Beginning Balance		2,194	2,631
Allowance for Loan Losses: Charge-offs		(64)	(187)
Allowance for Loan Losses: Recoveries		122	10
Allowance for Loan losses: Provision		(501)	(260)
Allowance for Loan Losses: Ending Balance		1,751	2,194
Allowance for Loan Losses: Ending Balance: Individually evaluated for impairment		413	95
Allowance for Loan Losses: Ending Balance: Collectively evaluated for impairment		1,338	2,099
Allowance for Loan Losses: Totals		1,751	2,194
Financing Receivables: Ending Balance: Individually evaluated for impairment		5,175	5,351
Financing Receivables: Ending Balance: Collectively evaluated for impairment		211,950	201,911
Total loans		217,125	207,262
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses: Beginning Balance		812	935
Allowance for Loan Losses: Charge-offs		(257)	(79)
Allowance for Loan Losses: Recoveries		54	39
Allowance for Loan losses: Provision		464	(83)
Allowance for Loan Losses: Ending Balance		1,073	812
Allowance for Loan Losses: Ending Balance: Individually evaluated for impairment		184	119
Allowance for Loan Losses: Ending Balance: Collectively evaluated for impairment		889	693
Allowance for Loan Losses: Totals		1,073	812
Financing Receivables: Ending Balance: Individually evaluated for impairment		241	140
Financing Receivables: Ending Balance: Collectively evaluated for impairment		81,290	76,240
Total loans		81,531	76,380
Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses: Beginning Balance		549	605
Allowance for Loan Losses: Charge-offs			(120)
Allowance for Loan Losses: Recoveries		36
Allowance for Loan losses: Provision		79	64
Allowance for Loan Losses: Ending Balance		664	549
Allowance for Loan Losses: Ending Balance: Individually evaluated for impairment		87	131
Allowance for Loan Losses: Ending Balance: Collectively evaluated for impairment		577	418
Allowance for Loan Losses: Totals		664	549
Financing Receivables: Ending Balance: Individually evaluated for impairment		2,818	1,763
Financing Receivables: Ending Balance: Collectively evaluated for impairment		56,881	50,699
Total loans		$ 59,699	$ 52,462
[1] Includes net deferred loan costs of $263 and $330, respectively.

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- Definition

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

+ References

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

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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.

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

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

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The balance of financing receivables that were collectively evaluated for impairment.

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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 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 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.

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