Fair Values (Quantitative Information About Level 3 Fair Value Measurements) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		$ 1,814	$ 1,538
Other real estate owned, fair value		817	2,485
Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		1,814	1,538
Other real estate owned, fair value		817	2,485
Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Mortgage [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		4	964
Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Mortgage [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		46
Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Term [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		1,648	79
Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Construction [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans			358
Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Consumer: Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		$ 116	$ 137
Level 3 [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Disposal Costs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]	(8.00%)	(8.00%)
Level 3 [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Mortgage [Member] | Appraisal Adjustments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]	0.00%	0.00%
Level 3 [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Mortgage [Member] | Disposal Costs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]	(8.00%)	(8.00%)
Level 3 [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Mortgage [Member] | Appraisal Adjustments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]	0.00%
Level 3 [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Mortgage [Member] | Disposal Costs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]	(8.00%)
Level 3 [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Term [Member] | Appraisal Adjustments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]	0.00%	(72.00%)
Level 3 [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Term [Member] | Disposal Costs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]	0.00%	(11.00%)
Level 3 [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Construction [Member] | Appraisal Adjustments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]		0.00%
Level 3 [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Construction [Member] | Disposal Costs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]		(8.00%)
Level 3 [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Consumer: Other [Member] | Appraisal Adjustments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]	0.00%	0.00%
Level 3 [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Consumer: Other [Member] | Disposal Costs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]	(8.00%)	(8.00%)
Level 3 [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Disposal Costs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]	(8.00%)	(8.00%)
Level 3 [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Mortgage [Member] | Appraisal Adjustments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]	0.00%	(25.00%)
Level 3 [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Mortgage [Member] | Disposal Costs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]	(8.00%)	(12.00%)
Level 3 [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Mortgage [Member] | Appraisal Adjustments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]	0.00%
Level 3 [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Mortgage [Member] | Disposal Costs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]	(8.00%)
Level 3 [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Term [Member] | Appraisal Adjustments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]	(50.00%)	(72.00%)
Level 3 [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Term [Member] | Disposal Costs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]	(9.00%)	(11.00%)
Level 3 [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Construction [Member] | Appraisal Adjustments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]		0.00%
Level 3 [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Construction [Member] | Disposal Costs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]		(8.00%)
Level 3 [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Consumer: Other [Member] | Appraisal Adjustments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]	0.00%	0.00%
Level 3 [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Consumer: Other [Member] | Disposal Costs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]	(8.00%)	(8.00%)
Level 3 [Member] | Weighted Average [Member] | Consumer: Other [Member] | Appraisal Adjustments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)			0.00%
Level 3 [Member] | Weighted Average [Member] | Consumer: Other [Member] | Disposal Costs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)			(8.00%)
Level 3 [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Disposal Costs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]	(8.00%)	(8.00%)
Level 3 [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Mortgage [Member] | Appraisal Adjustments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]	0.00%	(22.00%)
Level 3 [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Residential Mortgage [Member] | Disposal Costs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]	(8.00%)	(9.00%)
Level 3 [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Mortgage [Member] | Appraisal Adjustments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]	0.00%
Level 3 [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Mortgage [Member] | Disposal Costs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]	(8.00%)
Level 3 [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Term [Member] | Appraisal Adjustments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]	(6.00%)	(72.00%)
Level 3 [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Term [Member] | Disposal Costs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]	(8.00%)	(11.00%)
Level 3 [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Construction [Member] | Appraisal Adjustments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]		0.00%
Level 3 [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial Construction [Member] | Disposal Costs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]		(8.00%)
Level 3 [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Consumer: Other [Member] | Appraisal Adjustments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]	0.00%	0.00%
Level 3 [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Consumer: Other [Member] | Disposal Costs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	[1],[2]	(8.00%)	(8.00%)

[1] Appraisals are adjusted by management for qualitative factors, such as economic conditions and estimated disposal costs.

[2] Fair value is generally determined through independent appraisals or sales contracts of the underlying collateral, which generally include various level 3 inputs which are not identifiable.