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Loan Quality and Allowance for Loan Losses (Troubled Debt Restructuring Loans) (Details) $ in Thousands		12 Months Ended
		Dec. 31, 2018 USD ($) contract	Dec. 31, 2017 USD ($) contract
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings: Number of Contracts | contract		16	17
Troubled Debt Restructurings: Recorded Investment		$ 11,232	$ 12,186
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Number of Contracts | contract			2
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Recorded Investment			$ 634
New During Period, Number of Contracts | contract		0
Performing [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings: Recorded Investment	[1]	$ 9,487	11,555
Nonperforming [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings: Recorded Investment	[1]	$ 1,745	$ 631
Residential Real Estate - Construction [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings: Number of Contracts | contract		1	1
Troubled Debt Restructurings: Recorded Investment		$ 455	$ 466
Residential Real Estate - Construction [Member] | Performing [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings: Recorded Investment	[1]		$ 466
Residential Real Estate - Construction [Member] | Nonperforming [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings: Recorded Investment	[1]	$ 455
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings: Number of Contracts | contract		4	5
Troubled Debt Restructurings: Recorded Investment		$ 678	$ 737
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Number of Contracts | contract			1
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Recorded Investment			$ 39
Residential Real Estate [Member] | Performing [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings: Recorded Investment	[1]	$ 678	701
Residential Real Estate [Member] | Nonperforming [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings: Recorded Investment	[1]		$ 36
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings: Number of Contracts | contract		11	11
Troubled Debt Restructurings: Recorded Investment		$ 10,099	$ 10,983
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Number of Contracts | contract			1
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Recorded Investment			$ 595
Commercial Real Estate [Member] | Performing [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings: Recorded Investment	[1]	8,809	10,388
Commercial Real Estate [Member] | Nonperforming [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings: Recorded Investment	[1]	$ 1,290	$ 595
[1] The performing status is determined by the loan's compliance with the modified terms.

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Number of financing receivables that have been modified by troubled debt restructurings.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
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