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Loans and Related Allowance for Loan Losses (Modification of Troubled Debt Restructuring by Class) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016 USD ($) contract	Sep. 30, 2015 USD ($) contract	Sep. 30, 2016 USD ($) loan	Sep. 30, 2015 USD ($) contract
Temporary Rate Modification [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	0	1	1	1
Recorded Investment	$ 0	$ 156	$ 54	$ 156
Temporary Rate Modification [Member] | Commercial real estate- non owner-occupied [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	0	0	0	0
Recorded Investment	$ 0	$ 0	$ 0	$ 0
Temporary Rate Modification [Member] | Commercial real estate- all other CRE [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	0	0	0	0
Recorded Investment	$ 0	$ 0	$ 0	$ 0
Temporary Rate Modification [Member] | Acquisition and development- 1-4 family residential construction [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	0	0	0	0
Recorded Investment	$ 0	$ 0	$ 0	$ 0
Temporary Rate Modification [Member] | Acquisition and development- All other A&D [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	0	0	0	0
Recorded Investment	$ 0	$ 0	$ 0	$ 0
Temporary Rate Modification [Member] | Commercial and industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	0	0	0	0
Recorded Investment	$ 0	$ 0	$ 0	$ 0
Temporary Rate Modification [Member] | Residential mortgage- term [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	0	1	1	1
Recorded Investment	$ 0	$ 156	$ 54	$ 156
Temporary Rate Modification [Member] | Residential mortgage- home equity [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	0	0	0	0
Recorded Investment	$ 0	$ 0	$ 0	$ 0
Temporary Rate Modification [Member] | Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	0	0	0	0
Recorded Investment	$ 0	$ 0	$ 0	$ 0
Extended Maturity [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	4	0	5	8
Recorded Investment	$ 2,789	$ 0	$ 2,992	$ 5,235
Extended Maturity [Member] | Commercial real estate- non owner-occupied [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	0	0	0	1
Recorded Investment	$ 0	$ 0	$ 0	$ 3,097
Extended Maturity [Member] | Commercial real estate- all other CRE [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	0	0	1	1
Recorded Investment	$ 0	$ 0	$ 203	$ 237
Extended Maturity [Member] | Acquisition and development- 1-4 family residential construction [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	1	0	1	0
Recorded Investment	$ 582	$ 0	$ 582	$ 0
Extended Maturity [Member] | Acquisition and development- All other A&D [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	1	0	1	3
Recorded Investment	$ 1,664	$ 0	$ 1,664	$ 372
Extended Maturity [Member] | Commercial and industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	1	0	1	1
Recorded Investment	$ 482	$ 0	$ 482	$ 930
Extended Maturity [Member] | Residential mortgage- term [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	1	0	1	2
Recorded Investment	$ 61	$ 0	$ 61	$ 599
Extended Maturity [Member] | Residential mortgage- home equity [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	0	0	0	0
Recorded Investment	$ 0	$ 0	$ 0	$ 0
Extended Maturity [Member] | Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	0	0	0	0
Recorded Investment	$ 0	$ 0	$ 0	$ 0
Modification Of Payment And Other Terms [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	0	2	2	7
Recorded Investment	$ 0	$ 2,446	$ 558	$ 6,545
Modification Of Payment And Other Terms [Member] | Commercial real estate- non owner-occupied [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	0	0	0	1
Recorded Investment	$ 0	$ 0	$ 0	$ 136
Modification Of Payment And Other Terms [Member] | Commercial real estate- all other CRE [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	0	0	0	5
Recorded Investment	$ 0	$ 0	$ 0	$ 3,847
Modification Of Payment And Other Terms [Member] | Acquisition and development- 1-4 family residential construction [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	0	1	0	0
Recorded Investment	$ 0	$ 700	$ 0	$ 700
Modification Of Payment And Other Terms [Member] | Acquisition and development- All other A&D [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	0	1	0	0
Recorded Investment	$ 0	$ 1,746	$ 0	$ 1,746
Modification Of Payment And Other Terms [Member] | Commercial and industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	0	0	1	0
Recorded Investment	$ 0	$ 0	$ 486	$ 0
Modification Of Payment And Other Terms [Member] | Residential mortgage- term [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	0	0	1	1
Recorded Investment	$ 0	$ 0	$ 72	$ 116
Modification Of Payment And Other Terms [Member] | Residential mortgage- home equity [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	0	0	0	0
Recorded Investment	$ 0	$ 0	$ 0	$ 0
Modification Of Payment And Other Terms [Member] | Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	0	0	0	0
Recorded Investment	$ 0	$ 0	$ 0	$ 0

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- Definition

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