Allowance For Loan Losses And Credit Quality Of Financing Receivables (Allowances Of Loan Losses And Loans Receivable By Class Disaggregated) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Balance	$ 6,696	$ 5,590	$ 5,641
Allowance for Loan Losses, Balance Related to Loans Individually Evaluated for Impairment	155	264
Allowance for Loan Losses, Balance Related to Loans Collectively Evaluated for Impairment	5,164	4,558
Total Financing Receivables	696,142	544,090
Loans Receivable, Individually Evaluated for Impairment	6,597	6,864
Loans Receivable, Collectively Evaluated for Impairment	689,545	537,226
Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Balance	110	85	231
Allowance for Loan Losses, Balance Related to Loans Individually Evaluated for Impairment	14
Allowance for Loan Losses, Balance Related to Loans Collectively Evaluated for Impairment	96	85
Total Financing Receivables	40,280	20,023
Loans Receivable, Individually Evaluated for Impairment	33	20
Loans Receivable, Collectively Evaluated for Impairment	40,247	20,003
Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Balance	359	220	383
Allowance for Loan Losses, Balance Related to Loans Collectively Evaluated for Impairment	359	220
Total Financing Receivables	25,360	13,348
Loans Receivable, Collectively Evaluated for Impairment	25,360	13,348
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Balance	3,932	3,646	3,491
Allowance for Loan Losses, Balance Related to Loans Individually Evaluated for Impairment	135	112
Allowance for Loan Losses, Balance Related to Loans Collectively Evaluated for Impairment	3,797	3,534
Total Financing Receivables	479,227	382,262
Loans Receivable, Individually Evaluated for Impairment	4,597	5,160
Loans Receivable, Collectively Evaluated for Impairment	474,630	377,102
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Balance	899	784	903
Allowance for Loan Losses, Balance Related to Loans Individually Evaluated for Impairment	6	79
Allowance for Loan Losses, Balance Related to Loans Collectively Evaluated for Impairment	893	705
Total Financing Receivables	150,237	127,204
Loans Receivable, Individually Evaluated for Impairment	1,967	1,546
Loans Receivable, Collectively Evaluated for Impairment	148,270	125,658
Consumer And Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Balance	19	87	19
Allowance for Loan Losses, Balance Related to Loans Individually Evaluated for Impairment		73
Allowance for Loan Losses, Balance Related to Loans Collectively Evaluated for Impairment	19	14
Total Financing Receivables	1,038	1,253
Loans Receivable, Individually Evaluated for Impairment		138
Loans Receivable, Collectively Evaluated for Impairment	1,038	1,115
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Balance	$ 1,377	$ 768	$ 614

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

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)(1)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524

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- Definition

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

+ 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)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524

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- Definition

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

+ 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)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524

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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

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

+ 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 (h)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524

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- Definition

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

+ 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 (h)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524

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- Definition

Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.3)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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