Fair Value Accounting and Measurement (Quantitative Information About Level 3 Fair Value Measurements) (Details) - USD ($)
$ in Thousands

12 Months Ended

Dec. 31, 2016

Dec. 31, 2015

Fair Value Inputs, Assets, Quantitative Information [Line Items]

Fair Value Inputs, Assets, Quantitative Information [Table Text Block]

The range and weighted-average of the significant unobservable inputs used to fair value our Level 3 nonrecurring assets during 2016 and 2015, along with the valuation techniques used, are shown in the following tables:

	Fair value  at December 31, 2016		Valuation Technique	Unobservable Input	Range (Weighted Average) (1)
	(dollars in thousands)
Impaired loans - collateral-dependent (3)	$	2,248	Fair Market Value of Collateral	Adjustment to Stated Value	N/A (2)
Impaired loans - other	$	1,539	Discounted Cash Flow	Discount Rate	4.50% - 6.50% (5.26%)
OREO	$	4,388	Fair Market Value of Collateral	Adjustment to Appraisal Value	N/A (2)
(1) Discount rate used in discounted cash flow valuation.
(2) Quantitative disclosures are not provided for collateral-dependent impaired loans and OREO because there were no adjustments made to the appraisal values or stated values during the current period.
(3) Collateral consists of accounts receivable, inventory, equipment, and real property.

	Fair value  at December 31, 2015		Valuation Technique	Unobservable Input	Range (Weighted Average) (1)
	(dollars in thousands)
Impaired loans - real estate collateral	$	380	Fair Market Value of Collateral	Adjustment to Appraisal Value	N/A (2)
Impaired loans - other collateral (3)	$	378	Fair Market Value of Collateral	Adjustment to Stated Value	N/A (2)
OREO	$	4,524	Fair Market Value of Collateral	Adjustment to Appraisal Value	N/A (2)
(1) Discount applied to appraisal value, letter of intent to purchase, or stated value (in the case of equipment and life insurance).
(2) Quantitative disclosures are not provided because there were no adjustments made to the appraisal value during the current period.
(3) Other collateral consists of equipment and life insurance.

Fair Value, Measurements, Nonrecurring [Member]

Fair Value Inputs, Assets, Quantitative Information [Line Items]

Impaired loans

$ 3,787

$ 758

Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]

Fair Value Inputs, Assets, Quantitative Information [Line Items]

Impaired loans

3,787

758

Other Real Estate Owned, Fair Value Disclosure

$ 4,388

$ 4,524