Loans And The Allowance For Loan Losses (Recorded Investment In Loans Past Due) (Details) - USD ($) $ in Thousands		Sep. 30, 2017		Dec. 31, 2016	Sep. 30, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		$ 21,030		$ 28,627
Current Balance		975,878		913,102
Total		996,908		941,729	$ 912,137
90+ Days Accruing		1		722
Non-accruing Loans		13,388		11,298
Net deferred loan origination costs		1,097		783	715
30-59 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		11,962		14,712
60-89 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		4,163		4,740
90+ Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		4,905		9,175
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		6,415		10,888
Current Balance		200,695		186,483
Total		207,110		197,371	187,440
90+ Days Accruing		1
Non-accruing Loans		2,363		3,106
Commercial And Industrial [Member] | 30-59 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		3,491		6,772
Commercial And Industrial [Member] | 60-89 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		912		2,966
Commercial And Industrial [Member] | 90+ Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		2,012		1,150
Home Equities [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,489		1,279
Current Balance		65,854		64,955
Total		67,343		66,234
Non-accruing Loans		1,081		1,261
Home Equities [Member] | 30-59 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		538		481
Home Equities [Member] | 60-89 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		381		119
Home Equities [Member] | 90+ Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		570		679
Consumer And Other Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		29		30
Current Balance		1,492		1,387
Total		1,521		1,417	1,531
Non-accruing Loans		10		17
Consumer And Other Loans [Member] | 30-59 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		7		15
Consumer And Other Loans [Member] | 60-89 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		12		10
Consumer And Other Loans [Member] | 90+ Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		10		5
Total Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total		788,277		742,941
Total Real Estate Loans [Member] | Residential Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	[1]	127,796			112,899
Total Real Estate Loans [Member] | Commercial Real Estate Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total		593,138	[1]	555,625	546,129	[1]
Total Real Estate Loans [Member] | Home Equities [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total		67,343		66,234	$ 64,138
Mortgages [Member] | Total Real Estate Loans [Member] | Residential Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,759		1,558
Current Balance		124,187		116,984
Total		125,946		118,542
Non-accruing Loans		1,146		862
Mortgages [Member] | Total Real Estate Loans [Member] | Residential Mortgages [Member] | 30-59 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		829		868
Mortgages [Member] | Total Real Estate Loans [Member] | Residential Mortgages [Member] | 60-89 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		105		123
Mortgages [Member] | Total Real Estate Loans [Member] | Residential Mortgages [Member] | 90+ Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		825		567
Mortgages [Member] | Total Real Estate Loans [Member] | Commercial Real Estate Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		3,957		10,198
Current Balance		488,735		452,187
Total		492,692		462,385
90+ Days Accruing				483
Non-accruing Loans		8,788		1,874
Mortgages [Member] | Total Real Estate Loans [Member] | Commercial Real Estate Mortgages [Member] | 30-59 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		168		6,319
Mortgages [Member] | Total Real Estate Loans [Member] | Commercial Real Estate Mortgages [Member] | 60-89 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		2,301		1,522
Mortgages [Member] | Total Real Estate Loans [Member] | Commercial Real Estate Mortgages [Member] | 90+ Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		1,488		2,357
Construction [Member] | Total Real Estate Loans [Member] | Residential Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Balance		1,850		2,540
Total		1,850		2,540
Construction [Member] | Total Real Estate Loans [Member] | Commercial Real Estate Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		7,381		4,674
Current Balance		93,065		88,566
Total		100,446		93,240
90+ Days Accruing				239
Non-accruing Loans				4,178
Construction [Member] | Total Real Estate Loans [Member] | Commercial Real Estate Mortgages [Member] | 30-59 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		6,929		257
Construction [Member] | Total Real Estate Loans [Member] | Commercial Real Estate Mortgages [Member] | 60-89 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		$ 452
Construction [Member] | Total Real Estate Loans [Member] | Commercial Real Estate Mortgages [Member] | 90+ Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due				$ 4,417

[1] Includes construction loans